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
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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.

320600
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)

470 ft2 net interior space inside

Interior

Inside your ADU

ADU Ashbury 440 interior with mezzanine level in loft style with stairs, work desk and lots of natural light
Ashbury ADU mezzanine level design - cozy loft area with bed and wooden shelves
Ashbury ADU living room interior with stairs to second floor, coach and work table
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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.

Try now
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

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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.

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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!

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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.

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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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