Mirror
Corner view of accessory dwelling unit with pitched roof and modern design in a nice garden
Modern prefab ADU with pitched roof, skylights and mezzanine level with a stone pathway in a well-maintained backyard
Ashbury 440, prefabricated ADU by Wellmade with pitched roof, featuring deck, bench and skylights
Night view of a modern design small house with natural wood facade and black pitched roof
No items found.
01
Fully built
02
Permit required
03
No cranes needed
04
25-35 days on-site work
05
6-9 months start to finish
Ashbury 440

Featuring pitched roofs and mezzanine spaces, Ashbury ADUs set a new standard for efficient living. These prefab ADUs are both cozy and practical, with layouts that maximize usability.

333200
Including permitting process, utility connections, delivery, installation, and taxes. Price may change based on the feasibility report.
01
Fully built
02
Permit required
03
No cranes needed
04
25-35 days on-site work
05
6-9 months start to finish

What's included

  • Prefabricated panel system allows for fast installation and no cranes
  • Concrete slab on grade
  • Utility connections to the main house (up to 50 ft included)
  • Marvin premium fiberglass black windows and doors
  • Finished inside and out, including appliances, fixtures, and kitchen cabinets
  • Interior finish options available
  • Deck, skylight, and other upgrades available

This one-bedroom prefab ADU is designed to maximize every square foot. It features a fully separate bedroom and a spacious living room, offering a perfect blend of comfort and functionality.

440 ft2 of the exterior wall

(14′-8″ x 34′ nominal size)

440 ft2 net interior space

extra 180 ft2 of mezzanine

informational brochures

Download our detailed brochures to learn more about our products, features, and customization options. Get all the information you need to make an informed decision.

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Financing options available with our partner, Stanford Federal Credit Union

Rates starting at Prime minus 1%
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Interior

Inside your ADU

Mezzanine view in an Ashbury 440 ADU.
Living room with mezzanine in an Ashbury 440 ADU.
Mezzanine level in an Ashbury 440 ADU.
Modern bedroom inside an Ashbury 440 ADU.
Modern bathroom inside an Ashbury 440 ADU.
Modern kitchen and dining area in the Ashbury 440 ADU by Wellmade.
No items found.

Finishes:

  • Painted walls
  • Laminate flooring for living room. Tile floor and shower in bathroom (color options available)
  • Tile kitchen backsplash (options available)

Kitchen:

  • Premium kitchen cabinets
  • Sink, fridge, cooktop

Bathroom:

  • Toilet, shower and vanity

Use your phone to view this ADU in your backyard

Place this prefab ADU in your backyard with augmented reality to understand how it fits in the space.

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Hands holding a tablet displaying an augmented reality view of a modern prefab studio shed with a modern design and corner door, situated in a lush backyard with trees and a stone pathway.
Reviews

We  love our clients!
Hear what they have to say

Ashiq George

We came across the website for Wellmade when searching for options of creating an outdoor office/gym for our house in the east bay. It was helpful that the company was from the area and we were able visit and preview some of the finished sheds nearby. were definitely impressed with the design and layout. It was a great experience working with team and we were impressed with how quickly it was built and assembled. Also, six months later after we noticed some issues with the skylights the team was very prompt and corrected the issue as covered by the warranty. Overall would highly recommend them

We came across the website for Wellmade when searching for options of creating an outdoor office/gym for our house in the east bay. It was helpful that the company was from the area and we were able visit and preview some of the finished sheds nearby. were definitely impressed with the design and layout. It was a great experience working with team and we were impressed with how quickly it was built and assembled. Also, six months later after we noticed some issues with the skylights the team was very prompt and corrected the issue as covered by the warranty. Overall would highly recommend them

Ashiq George
5.0
Kevin Wong

We are extremely happy with the Sunset shed and would definitely recommend Wellmade. The process went very smoothly. Our shed was finished in 6 business days. We were amazed at the quick progress each day. The crew started early and worked full days. They were very nice and communicated really well throughout the process. The shed is high quality and my wife and I are looking forward to working from home. It's nice to get a well designed product from a local Bay Area company.

We are extremely happy with the Sunset shed and would definitely recommend Wellmade. The process went very smoothly. Our shed was finished in 6 business days. We were amazed at the quick progress each day. The crew started early and worked full days. They were very nice and communicated really well throughout the process. The shed is high quality and my wife and I are looking forward to working from home. It's nice to get a well designed product from a local Bay Area company.

Kevin Wong
5.0
Mika Brown

We had the most wonderful experience with Wellmade. Everything was perfect, from start to finish. I am in love with my new studio office! The build crew (Sergey, Andre and Anthony) were so professional, hardworking and respectful. They worked so hard on the project and completed everything right on time. I highly recommend this company to anyone looking to add extra space to their home. It was such an easy process and they really took care of everything!

We had the most wonderful experience with Wellmade. Everything was perfect, from start to finish. I am in love with my new studio office! The build crew (Sergey, Andre and Anthony) were so professional, hardworking and respectful. They worked so hard on the project and completed everything right on time. I highly recommend this company to anyone looking to add extra space to their home. It was such an easy process and they really took care of everything!

Mika Brown
5.0
Ruslan Golovach

We recently had a positive experience with Wellmade when they installed their "Sunset" model shed unit in our backyard, and we are very satisfied with the outcome.
From start to finish, the process was seamless and efficient. The project was completed without any delays or interruptions.
The team of builders and contractors were highly professional, respectful of our space, ensuring minimal disruption to our daily routine.
Communication with Wellmade team was clear and consistent throughout the entire project, which we greatly appreciated.
Overall, we highly recommend Wellmade for their excellent service, professionalism, and the high-quality shed units they provide.

We recently had a positive experience with Wellmade when they installed their "Sunset" model shed unit in our backyard, and we are very satisfied with the outcome.
From start to finish, the process was seamless and efficient. The project was completed without any delays or interruptions.
The team of builders and contractors were highly professional, respectful of our space, ensuring minimal disruption to our daily routine.
Communication with Wellmade team was clear and consistent throughout the entire project, which we greatly appreciated.
Overall, we highly recommend Wellmade for their excellent service, professionalism, and the high-quality shed units they provide.

Ruslan Golovach
5.0
Sam Heft-Neal

We had a wonderful experience working with Wellmade. We went with the Presidio model to be used as a two person office and while we were initially concerned that it might feel tight for two workspaces it turned out to be quite comfortable. The project came out great and just as we had imagined. It looks exactly like it did in the pictures. We are also glad we went with some of the extra features like the heated floor and skylight.

We had a wonderful experience working with Wellmade. We went with the Presidio model to be used as a two person office and while we were initially concerned that it might feel tight for two workspaces it turned out to be quite comfortable. The project came out great and just as we had imagined. It looks exactly like it did in the pictures. We are also glad we went with some of the extra features like the heated floor and skylight.

Sam Heft-Neal
5.0
Sebastian Alvarado

We had a custom Sunset 120 sq ft shed made to match our house and I am absolutely thrilled with the experience. It was difficult to find the perfect option for our studio gym and after months of researching options, we contacted Wellmade. Our overall experience with Wellmade was wonderful. From our initial conversation with Ian, to the final touches on the installation, everything exceeded my expectations. Wellmade worked with us to pick out all of the finishes that would match our house and property. The project came out amazing and just as we had hoped. It looks exactly like it did in the rendering. We loved the cedar and metal look of the sheds but unfortunately it did not match our house. We decided to go with the same siding as our house (white hardie plank) and the same sconces.

The design of the shed is modern and sleek with clean lines that easily complement my home’s overall aesthetic. The large windows allow natural light to pour in, creating a bright and airy space. It’s a perfect blend of functionality and style, which makes it feel more like an extension of our home rather than just a shed.

The installation process was smooth and easy, thanks to the clear instructions provided by Masha, the project manager. The team was efficient and friendly, and it only took a few days to build. Masha was great to work with. Her communication and attention to detail was very helpful.

Overall, I highly recommend Wellmade for anyone looking for a high-quality, stylish, and functional backyard structure. What we love most about the shed is how versatile the space is. Whether you’re looking for a home office, art studio, or just a cozy place to relax, this shed fits the bill. I’ve transformed mine into a home gym.

We had a custom Sunset 120 sq ft shed made to match our house and I am absolutely thrilled with the experience. It was difficult to find the perfect option for our studio gym and after months of researching options, we contacted Wellmade. Our overall experience with Wellmade was wonderful. From our initial conversation with Ian, to the final touches on the installation, everything exceeded my expectations. Wellmade worked with us to pick out all of the finishes that would match our house and property. The project came out amazing and just as we had hoped. It looks exactly like it did in the rendering. We loved the cedar and metal look of the sheds but unfortunately it did not match our house. We decided to go with the same siding as our house (white hardie plank) and the same sconces.

The design of the shed is modern and sleek with clean lines that easily complement my home’s overall aesthetic. The large windows allow natural light to pour in, creating a bright and airy space. It’s a perfect blend of functionality and style, which makes it feel more like an extension of our home rather than just a shed.

The installation process was smooth and easy, thanks to the clear instructions provided by Masha, the project manager. The team was efficient and friendly, and it only took a few days to build. Masha was great to work with. Her communication and attention to detail was very helpful.

Overall, I highly recommend Wellmade for anyone looking for a high-quality, stylish, and functional backyard structure. What we love most about the shed is how versatile the space is. Whether you’re looking for a home office, art studio, or just a cozy place to relax, this shed fits the bill. I’ve transformed mine into a home gym.

Sebastian Alvarado
5.0
Simon Parmeggiani

Absolutely in awe with our new backyard unit. We chose a Presidio to have a relaxing space where to listen to jazz records, read and enjoy a drink. It looks amazing and it was built in just 5 days! So impressed with the construction team - professional hard workers, respectful and considerate.The end to end experience has been absolutely amazing. Highly recommended!

Absolutely in awe with our new backyard unit. We chose a Presidio to have a relaxing space where to listen to jazz records, read and enjoy a drink. It looks amazing and it was built in just 5 days! So impressed with the construction team - professional hard workers, respectful and considerate.The end to end experience has been absolutely amazing. Highly recommended!

Simon Parmeggiani
5.0
Lucinda Daly

The process for securing a 120 square-foot office shed in my backyard in Berkeley was seamless with Wellmade. Everything from my initial contact by phone to the final installation was efficient and pleasurable. The dream team of Tim, Tim, and Alexander completed the entire build in one week. They were cordial, diligent, and skilled.

If you are looking for a high quality, beautifully designed, and reasonably priced shed or ADU I sincerely recommend Wellmade and their fabulous prefabs!

The process for securing a 120 square-foot office shed in my backyard in Berkeley was seamless with Wellmade. Everything from my initial contact by phone to the final installation was efficient and pleasurable. The dream team of Tim, Tim, and Alexander completed the entire build in one week. They were cordial, diligent, and skilled.

If you are looking for a high quality, beautifully designed, and reasonably priced shed or ADU I sincerely recommend Wellmade and their fabulous prefabs!

Lucinda Daly
5.0
Chris Ford

Hello!

I am writing this from inside my Wellmade shed. Less than two weeks ago these same geographical coordinates were just an underperforming bald spot in my backyard. How did I get here, how did I feel along the way and what do I think of my sassy new Twin Peaks work from home office, sanity hut, and sweat lodge? Read on!

I was red pilled into the world of prefab via the Sunset Breeze House back in 2012. I won’t bore you with the details, suffice it to say I fell in love with the idea of a well made modern house that could be built off site and assembled on property.

But like for a lot of people, the idea of putting a Breeze House on a flat, expansive lot here in Marin was just never going to happen. If I was going to dream, I was going to have to dream smaller.

Cut to April 2024. After moving to San Rafael we found ourselves in a house we absolutely loved, but was missing one very important thing — a place to work. At long last, I had my chance to dip my toe, and only my toe, into the world of modern prefab.

I knew I wanted a small shed. I knew I wanted it to feel like a real space. And I knew if I kept to 120 square feet, I wouldn’t need a permit. So the only real question became, who would build it? Actually the question became who would assemble it. Because most shed makers hand you off to someone they don’t really know or they leave you to fend for yourself and find your own contractor. 🤮

This, along with really lovely looking buildings, is what sets Wellmade apart. They build the unit and they assemble the unit. The right hand talks to the left. The left hand talks to the right. And sales talks to project management who, in turn, talk to the guys onsite. Not only can you go and see the factory and the materials, you can also weigh in on the materials and even make requests for special materials if that’s your thing.

Along the way I was kept informed of what I had selected (time between purchase and installation can be a couple months which is plenty of time for me to forget where I wanted the outlets.) And I got daily updates from the crew and project management about what was completed and what was left to do once it building commenced.

The best thing is, once finished, you have the perfect little space that can be whatever you want. Which I think is probably the most important piece of all.

Hello!

I am writing this from inside my Wellmade shed. Less than two weeks ago these same geographical coordinates were just an underperforming bald spot in my backyard. How did I get here, how did I feel along the way and what do I think of my sassy new Twin Peaks work from home office, sanity hut, and sweat lodge? Read on!

I was red pilled into the world of prefab via the Sunset Breeze House back in 2012. I won’t bore you with the details, suffice it to say I fell in love with the idea of a well made modern house that could be built off site and assembled on property.

But like for a lot of people, the idea of putting a Breeze House on a flat, expansive lot here in Marin was just never going to happen. If I was going to dream, I was going to have to dream smaller.

Cut to April 2024. After moving to San Rafael we found ourselves in a house we absolutely loved, but was missing one very important thing — a place to work. At long last, I had my chance to dip my toe, and only my toe, into the world of modern prefab.

I knew I wanted a small shed. I knew I wanted it to feel like a real space. And I knew if I kept to 120 square feet, I wouldn’t need a permit. So the only real question became, who would build it? Actually the question became who would assemble it. Because most shed makers hand you off to someone they don’t really know or they leave you to fend for yourself and find your own contractor. 🤮

This, along with really lovely looking buildings, is what sets Wellmade apart. They build the unit and they assemble the unit. The right hand talks to the left. The left hand talks to the right. And sales talks to project management who, in turn, talk to the guys onsite. Not only can you go and see the factory and the materials, you can also weigh in on the materials and even make requests for special materials if that’s your thing.

Along the way I was kept informed of what I had selected (time between purchase and installation can be a couple months which is plenty of time for me to forget where I wanted the outlets.) And I got daily updates from the crew and project management about what was completed and what was left to do once it building commenced.

The best thing is, once finished, you have the perfect little space that can be whatever you want. Which I think is probably the most important piece of all.

Chris Ford
5.0
David Louie

My wife and I are super-stoked with our Sunset shed from Wellmade. The entire experience was positive and we’re really pleased with the build quality and aesthetics of the shed.

The thing I want to emphasize most is the simplicity of the entire process. Most house projects we’ve done in the past have been friction filled. We’ve had to coordinate with various vendors, stress over myriad project details, and research materials without really having confidence in what we’re deciding. I can’t think of one house project that hasn’t had delays because of the difficulty in having the stars perfectly align for all the above (everyone is available, all materials are secured, all plan details are locked down).

Working with Wellmade on our shed was the complete opposite. My wife called it “instant gratification”. We had a couple simple video calls to walkthrough the space and discuss some details. I visited the WellMade office to look at the floor model. Once we decided to pull the trigger and schedule the date we filled out a simple spec sheet for things like wood color, window orientation, air conditioning, etc. When the start date came it was 5 and half days until the shed was done. The crew was amazing, hard working and not at all disruptive. When they finished there wasn’t a trace of construction debris which speaks volumes about their respect for a client’s property.

In the end, we have a quality home office / guest shed that aligns with our aesthetic sensibilities and we got it done with no stress or headaches. Thank you Masha, Andre and Sergey.

My wife and I are super-stoked with our Sunset shed from Wellmade. The entire experience was positive and we’re really pleased with the build quality and aesthetics of the shed.

The thing I want to emphasize most is the simplicity of the entire process. Most house projects we’ve done in the past have been friction filled. We’ve had to coordinate with various vendors, stress over myriad project details, and research materials without really having confidence in what we’re deciding. I can’t think of one house project that hasn’t had delays because of the difficulty in having the stars perfectly align for all the above (everyone is available, all materials are secured, all plan details are locked down).

Working with Wellmade on our shed was the complete opposite. My wife called it “instant gratification”. We had a couple simple video calls to walkthrough the space and discuss some details. I visited the WellMade office to look at the floor model. Once we decided to pull the trigger and schedule the date we filled out a simple spec sheet for things like wood color, window orientation, air conditioning, etc. When the start date came it was 5 and half days until the shed was done. The crew was amazing, hard working and not at all disruptive. When they finished there wasn’t a trace of construction debris which speaks volumes about their respect for a client’s property.

In the end, we have a quality home office / guest shed that aligns with our aesthetic sensibilities and we got it done with no stress or headaches. Thank you Masha, Andre and Sergey.

David Louie
5.0
Cynthia Rohrer

Wellmade has done an outstanding job in building my backyard office. The entire experience, from start to finish, was remarkably trouble-free and exceeded my expectations.

I'd like to give a special shout-out to the installation crew led by Sergei for their exceptional quality of work. Their attention to detail and craftsmanship have resulted in a backyard office that I'm truly proud of and excited to use.

Additionally, I want to particularly commend Project Manager Masha for her excellent communication throughout the entire process. Her responsiveness and clarity before, during, and after the installation were invaluable. It made the whole experience smooth and stress-free.

Thank you again for your outstanding work and customer service. I am thoroughly satisfied with the new backyard office, and I would not hesitate to recommend Wellmade to anyone looking for similar services.

Wellmade has done an outstanding job in building my backyard office. The entire experience, from start to finish, was remarkably trouble-free and exceeded my expectations.

I'd like to give a special shout-out to the installation crew led by Sergei for their exceptional quality of work. Their attention to detail and craftsmanship have resulted in a backyard office that I'm truly proud of and excited to use.

Additionally, I want to particularly commend Project Manager Masha for her excellent communication throughout the entire process. Her responsiveness and clarity before, during, and after the installation were invaluable. It made the whole experience smooth and stress-free.

Thank you again for your outstanding work and customer service. I am thoroughly satisfied with the new backyard office, and I would not hesitate to recommend Wellmade to anyone looking for similar services.

Cynthia Rohrer
5.0
Leo

Absolutely a fantastic experience working with Wellmade! The outdoor office is built at record speed and with utmost attention to detail. Quality is as good as it gets. Frankly the only option you should look at if you are in the market for an ADU or an outdoor office. THANKS WELLMADE!

Absolutely a fantastic experience working with Wellmade! The outdoor office is built at record speed and with utmost attention to detail. Quality is as good as it gets. Frankly the only option you should look at if you are in the market for an ADU or an outdoor office. THANKS WELLMADE!

FAQ
Company FAQs
Where are you located?

Our office and fabrication facility is in San Leandro, California.

Do you have a showroom? Can I come see it?

We don't have a full range of models on display, but we do have a showcase model to get a sense of the space. Give us a call at (510) 606-1706 and a customer service representative will make an appointment for you to visit us over in San Leandro and get a tour of our facilities.

What are your hours of operation?

Our customer service hours are 9am to 5pm PST Monday through Friday. Excluding federal holidays.

How long have you been in business?

We started in 2020 while most of the world was needing extra space to live comfortably. We've seen some great success since then, and we continue to focus on providing extra space to work, live and play.

What areas do you cover?

We comfortably serve all of California and Oregon. Occasionally, we get inquiries from other parts of the country, and we discuss those projects individually to make sure we're a good fit for the project.

Can I see a unit in-person?

We have installed units throughout California. If you'd like to visit one of our client's units, please work with a Wellmade representative to organize a visit. We'll check to make sure it's not disruptive to thier busy schedule.

Process FAQs
Where are you located?

Our office and fabrication facility is in San Leandro, California.

Do you have a showroom? Can I come see it?

We don't have a full range of models on display, but we do have a showcase model to get a sense of the space. Give us a call at (510) 606-1706 and a customer service representative will make an appointment for you to visit us over in San Leandro and get a tour of our facilities.

What are your hours of operation?

Our customer service hours are 9am to 5pm PST Monday through Friday. Excluding federal holidays.

How long have you been in business?

We started in 2020 while most of the world was needing extra space to live comfortably. We've seen some great success since then, and we continue to focus on providing extra space to work, live and play.

What areas do you cover?

We comfortably serve all of California and Oregon. Occasionally, we get inquiries from other parts of the country, and we discuss those projects individually to make sure we're a good fit for the project.

Can I see a unit in-person?

We have installed units throughout California. If you'd like to visit one of our client's units, please work with a Wellmade representative to organize a visit. We'll check to make sure it's not disruptive to thier busy schedule.

ADU FAQs
How is this different from a Shed?

ADUs typically have a bathroom and kitchen. A home office shed is a single-purpose space that doesn't have plumbing or appliances.

Does Wellmade handle the permits?

Yes. We'll process the permits on your behalf. However, you'll still need to pay the permit fee to the city.

How do I know it will work on my property?

We put a lot of time and effort into understanding your project before signing a contract. Unlike other construction companies, we do all of our research ahead of time so that your contract is all-included and there are no surprises down the road. Through our Feasibility Study process, we'll both understand what's possible on your property.

What’s included in the price I see on the website?

We've tried to be as transparent as possible by putting the fully-built unit price right here on the website for everyone to see. The only things that may change this price are: 1) any customizations or upgrades, and 2) any unique site conditions that we couldn't anticipate. Either way, we'll be able to get you a firm final price after we complete a Feasibility Study.

What additional contractors do I need to hire to complete the project?

None. We're set up to handle everything. With Wellmade, it's one company one contract.

What's included with installation?

Put simply...everything! We handle the fabrication, installation, foundation, finishes, and utilities. We can even prep the site or tear down an existing structure if it helps make your life easier. Our whole goal is to make this the easiest home project you've ever had.

How do you do the foundation?

With our prefab ADU, we build on a slab on grade concrete foundation.

Are utilities included?

Yes. We include utility lines for water, sewer, and electricity. The price you see on the website includes up to 50 feet.

Can the orientation be flipped?

Absolutely! Each of our models can be mirrored.

Can we build on a hill or slope?

We can, but it may take some additional engineering to build a prefab ADU on a slope. We'll work with you and our engineers closely to make sure we both understand what's needed.

What interior finishes and appliances are included?

Our prefab ADUs come with premium kitchen cabinets, sink, fridge, cooktop, toilet, shower, vanity, and color choices for walls and flooring

What color options do you have?

We've simplified the color choices of our modern ADUs to make it easy to mix and match. However, if you don't find the colors you want, let us know and we'll work with you to make it just right.

How far away from the fence do we need to be? What are the required setbacks?

Most jurisdictions in California require a 4-5 ft setback from the property line. We'll uncover those details in our Feasibility Study.

Wellmade Fillmore ADU

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