Custom Home Additions

We offer comprehensive home additions throughout Northern California and Nevada, with a focus on fine craftsmanship, and custom results.

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Bespoke Home Expansions

If your home no longer fits your lifestyle, you don’t necessarily need to move. A custom home addition allows you to create more space while staying in the house you love.

At Watershed Built, we design and build seamless home expansions for you. Interested in a solarium? Just need a new bedroom? We can help.

Whether you’re adding a new level, expanding your footprint, or reworking your layout, our team manages everything from concept through construction.

What Is a Custom Home Addition?

A home addition involves expanding your existing structure to add livable square footage. Unlike interior remodels, additions change the size and layout of your home.

Common types of additions include:

Rear or side home expansions
Solariums or sunroom additions
Second-story additions
Primary suite additions
Kitchen extensions
Accessory living spaces or guest suites
Garage conversions and expansions

Each addition is designed to integrate with your existing home so it feels cohesive, not like an afterthought.

Remodeling in San francisco

Mike and his team are super professional and responsive. They listen to your needs, communicate with you clearly, and provide the top notch service!

Xinru Liu

The quality of work was excellent and has stood the test of time, in that it still looks great 5+ years later. I would definitely recommend [Watershed Built].

Wendy Wilson

We worked with [Watershed Built] on a house remodel. They are all professional, clear, and honest. This was our first home remodel project and they made the process easy for us. Mike is honest – the project took exactly as long as he said it would, and we ended within our budget.

Caitlin Hannon

The work was great, the communication was clear and timely, and the extra efforts to solve problems was amazing. I never felt stressed because I always felt confident that the team was taking care of it. We are super pleased with the finished product and would recommend [Watershed Built] to anyone looking for a high quality contractor.

Carl A.

Michael Howes and the team at [Watershed Built] do absolutely stunning work. If you want high quality results on your residential remodeling project of any size, and an excellent team in the office and on the job site, call [Watershed Built].

Marisa N.

why watershed built

Precision, professionalism, and fully personalized service — from start to finish. Trust us to deliver exceptional value and extraordinary results.

Industry Experience

Deep, longstanding relationships with architects, interior designers, and trade partners ensure project cohesion from start to finish.

Expertise & Artistry

We offer a unique combination of artistry, efficiency, and personalized service that delivers quality results every time.

Adaptable Mindset

We are equally adept at small and large projects. We maintain a meticulous attention to detail and clear communication, no matter the scale.

Explore Our Previous Projects

Chef kitchen

With functional prep areas, an efficient layout, and professional-grade materials, this chef’s…….

Location

Meadow

Dark, moody colors and built-in library shelving make this space relaxing and…….

Location

Frequently asked questions

What is your service area?

We are a remodeling contractor in Northern California and Nevada, including San Francisco, Sonoma County, Marin County, and Lake Tahoe.

Do you offer kitchen or bathroom remodels?

Yes! In addition to full home renovations in San Francisco and surrounding areas, we offer speciality services like kitchen remodels and bathroom remodels.

What other services do you offer?

Beyond our high-end custom remodeling services, we enhance homes with custom woodwork, elevating spaces with fine craftsmanship and artistry.

How much does a full home remodel cost in San Francisco?

In San Francisco, the cost of a luxury home remodeling project depends on the scope, complexity, and selections. Smaller projects, like a cosmetic update to a small space may be $1,500, while a full home renovation may be closet to $1M. We can provide you with an accurate estimate for your project after a consultation. Get in touch to learn more.

What custom millwork options do you offer?

We offer custom cabinetry, millwork like trim, doors, and windows, paneling, shelving, built-ins and more. Our custom woodwork adds artistry and fine craftsmanship to homes, making your space a unique reflection of your taste and style.