Mirror
Modern ADU on a well maintained backyard with trees, bushes and pathways
Fillmore 330 a prefab ADU by Wellmade: Transformative living space space for relaxation and productivity.
Corner view of a modern prefab accessory dwelling unit - Fillmore 330 by Wellmade
Night view of a modern ADU - Fillmore 330 sqft: Your customizable haven for living
No items found.
01
Fully built
02
Permit required
03
No cranes needed
04
40-60 days on-site work
05
6-9 months start to finish
Fillmore 330

Fillmore ADUs combine modern aesthetics with low profile and functional design. These prefab ADUs are made for both comfort and practicality, with layouts that easily make effective use of space.

211600
Including permitting process, utility connections, installation, and taxes. Price may change based on the feasibility report.
We offer financing options starting
$100
/month.
Installation and taxes included in California
01
Fully built
02
Permit required
03
No cranes needed
04
40-60 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

5-Year Warranty

Our 5-year extended warranty guarantees the quality and durability of your Wellmade Shed or ADU. It covers structural defects and cosmetic issues, so you can enjoy your space worry-free.

Featuring a wingwall that separates the living and sleeping areas, this modern ADU feels more like an apartment than a studio providing privacy and a spacious, comfortable living space.

330 ft2 of the exterior wall

(14′-8″ x 26′ nominal size)

284 ft2 net interior space inside

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.

get brochure

Calculate your estimated monthly payment

211600
211600
Estimated monthly payment
$0.00
/ month
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

*Estimate based on loan amount, term, and APR provided. Actual rates, terms, and payments may vary based on your credit profile and other factors.

Based on a cost of
211600
211600
7.5
No items found.
Interior

Inside your ADU

Small living space interior - ADU with living room and bedroom
Nicely designed ADU with living space and small kitchen  featuring a skylight fr lots of natural light
Beautifully designed bathroom with blue shower tile and natural elements
ADU bathroom interior with vanity and light blue shower time with minimal natural decor
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
finished projects

Explore our ADUs in
clients' backyards

Experience comfort in your ADU with painted walls, premium floors, and high quality materials throughout.

Explore gallery
No items found.
VIRTUAL TOUR

Tour one of the ADUs we’ve delivered

Enter
3d Tour

Use your smartphone camera to view this ADU in your backyard

Place this studio shed in your backyard with Augmented Reality. Instantly see how it looks and fits on your property.

click to load
this model
Mirror
Scan the QR code for Augmented reality
Reviews

We  love our clients!
Hear what they have to say

5.0

It’s a sturdy, beautifully designed structure that adds both visual appeal and functionality to our backyard. We were especially impressed by the professionalism and hard-working spirit of the Wellmade installation crew.

Viola Narang
December 2, 2025
5.0

This is a great company and product; the unit is far more impressive in person than we had expected.  The team was amazing to work with.  Nothing but a positive experience, and we're thrilled with our backyard office.  :)

Greg Hajcak
December 2, 2025
5.0

Wellmade made the most sense for us not only cost wise, but they were prompt, responsive and knowledgeable.

Hailey
December 2, 2025
5.0

I can’t recommend Wellmade enough. From first contact to finished product, the entire process took just 30 days (literally... 30 days ago I made my first inquiry via email) and the result is stunning.

Alaina Hower
December 2, 2025
5.0

What really sets Wellmade apart is not just the quality of their work, but how seamless and stress-free they made the entire experience. Everyone I dealt with was professional, courteous, and genuinely invested in bringing my vision to life. My new backyard home office is beautiful, functional, and I look forward to settling into my new space and enjoying it for years to come.

Dustin Zahn
December 2, 2025
5.0

I'm blown away by how beautiful the Richmond is. The craftsmanship is superb and I wish I had more property so that we could get another from Wellmade. And, there's an incredible warranty that makes my purchase even more of a no-brainer. This was such an easy and satisfying process, they made everything from start to completion flawless, stress-free, and have provided me with a stunning piece of architecture that's the centerpiece of our soon-to-be backyard oasis.

Working with Wellmade has been a phenomenal experience. I checked out several companies and Wellmade was the only one that was truly transparent in their process and pricing.

Chris Joyce
December 2, 2025
5.0

What made this project even more special is how they integrated the shed with my existing outdoor deck. The crew came up with smart, creative solutions to make everything feel like one cohesive structure using the same composite decking and adding a clean step-up entrance that looks fantastic.

Aaron Michelson
December 2, 2025
5.0

We got the Presidio Max shed and the Laurel sauna. We could not be more happy. They both look great and I was honestly shocked at how quick the whole process was.   The crew was incredibly hard working and considerate. The final product is very high quality.

Nick Adler
December 2, 2025
5.0

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.

Chris Ford
December 2, 2025
5.0

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
June 11, 2025
5.0

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
June 11, 2025
5.0

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
June 11, 2025
5.0

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
June 11, 2025
5.0

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
June 11, 2025
5.0

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
June 11, 2025

Still have questions?
Get expert advice

Our experts are here to guide you! Get personalized recommendations, pricing details, and customization options tailored to your needs.

BOOK A CALL WITH OUR EXPERT
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. Click here to make an appointment to visit the showroom, or give us a call at (510) 606-1706 and a customer service representative will make an appointment for you.

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 the west coast (California, Oregon, Washington). 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 a fully-built Presidio shed in our showroom. You can make an appointment to see it here. We have other units installed 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 their busy schedule.

Process FAQs
What do you mean by ‘Prefab Panelized’?

We use traditional construction methods that meet or exceed the quality standards you're used to; but we've engineered the process to do most of the work in our warehouse. We make panels for our prefab ADUs and prefab sheds that fit together like a puzzle on your property, thereby minimizing disruption on-site. You can learn more about our process by watching this video

Where are your panels made/produced?

All of our panels are made in California with locally sourced materials.

Are you able to customize the units?

Absolutely! Most of our clients have something custom to fit their individual needs. There are some limitations due to our prefab process, but your sales representative will be best suited to work out those details with you.

How much do I need to be involved with the construction project?

We do the work so you don't have to. Our customers say it's the easiest home project they've ever done. Our team of project managers make sure that there's nothing you need to worry about.

Do I need to hire other subcontractors?

Not at all. We're planning to do everything for you with a full turnkey service. That means we can remove an existing structure, connect utilities, and process permits. If, of course, you'd like to do anything yourself with your own contractors, we can remove those details from our scope and quote.

Do I need to be on-site during installation?

Not really, no. We work closely with you to make sure we understand the project before getting started. Many of our clients go on vacation while we perform the install. However, it would be best to be available on the first day of installation to confirm placement and location.

How quickly can we get started?

Our prefab process streamlines installation and we can usually complete the project faster than others. If you have a tight timeline, be sure to communicate it to your sales representative so they can work with you on timing.

How long does it take to install?

Our prefab sheds take about 5-8 days to install, and we usually book those appointments 2-3 months after entering an agreement. Our prefab ADUs take about 5-6 weeks to install, and we book those appointments shortly after obtaining your permits.

Do you offer financing?

We don't offer financing ourselves, but we partner with Supreme Lending to help our clients spread out payments and make their project more affordable. Submit your information on their website

My backyard is hard to reach, is that a problem?

That's why we do what we do. Our system was designed with those hard-to-reach spaces in mind. Each of our panels can fit through any standard doorway, and everything is hand-carried. If you're getting turned away by other companies due to access constraints, let us know. We love a challenge!

Do you send someone to visit my site?

We certainly can, but we usually don't have to. After an intitial introductory call, your sales representative will perform an Virtual Site Visit where you will walk around your property while on a video meeting, and we'll record it. If we see any reason to go to the site ourselves, we'll send someone. But 95% of the time a virtual site visit is sufficient.

Do you use cranes?

Nope. Our prefab panelized process eliminates the need for cranes. Each of our panels can fit through any standard doorway and are carried by hand to the installation site.

Do you have warranty for the units?

You’ve got enough to think about. The unit should be the least of your concerns, which is why we offer a 5-year warranty starting from the date of project completion. This covers structural defects resulting directly from our construction work and certain cosmetic issues like:

  • Cracks in interior walls
  • Warping or cracks in exterior cedar boards and trims
  • Issues with decking materials, windows, doors, outlets, and light fixtures

Damage from vandalism, misuse, natural disasters, or extreme weather is not covered.

Manufacturer Warranties

Any equipment purchased from Wellmade is covered by the manufacturer's warranty, not Wellmade’s. These warranties will be passed on to you as allowed by law.

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

Ready to upgrade your backyard experience?

Fill out the form, we will be in touch with you shortly

Hi, I'm
.
I'm from
and I want to discuss my
and I'm interested in
project with you.
project.
Reach me at
and
.
Also, I'd like to
.
By entering your contact information, you confirm that you’ve read and agree to our Privacy Policy/Privacy Notice and consent to receive SMS text messages or phone calls from us. You can opt out at any time by replying STOP. This website is protected by Cloudflare Turnstile.
Thank you!
We will reach out to you shortly
Scheduling a call is the best way to make sure we connect.
Schedule a call
Oops! Something went wrong while submitting the form.
Visit our showroom
Visit our showroom
Wellmade team in the showroom.
Showroom shed
schedule a showroom visit