San Mateo ADU Builder

Custom ADU Builders
in San Mateo, California

200+ Happy Customers

Vacaville ADU Builder

Custom ADU Builders
in Vacaville, California

200+ Happy Customers

We Build ADUs in San Mateo

Looking for a trusted ADU builder in San Mateo? IMKAT specializes in designing and constructing high-quality Accessory Dwelling Units to fit your lifestyle and budget. Whether you’re considering a granny flat, rental unit, or a guest house, we provide end-to-end solutions, including permitting and construction.
Cost Estimator

Turnkey Custom ADU Calculator

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Monthly Payment i
$786
Total Price i
$131,000
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Choose Your ADU Size:

300

SF

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Bringing Family Together

One ADU At A Time

Bringing Family Together

One ADU at A Time

Why Build an ADU in San Mateo?

Building an Accessory Dwelling Unit (ADU) in San Mateo is a smart investment for homeowners. Whether you want to generate rental income, expand your living space, or increase your property value, an ADU offers numerous benefits tailored to the opportunities in San Mateo.

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What our clients say

#1 Rated ADU Builder in San Mateo

Why Build an ADU?

See why 1,000s of home owners are building ADUs

Earn up to $2,500/ month of Rental Income

The Perfect Retirement Plan

Get 3 Months of Assisted Living on Us

Thousands of retirees are choosing an ADU over expensive retirement homes in San Mateo

Thousands of retirees
are choosing an ADU over
expensive retirement homes
in California

Increase Property
Value up to 25% - 35%

Increase Living Space

Expand living space up to
1,200 SQFT

The Perfect Retirement Plan

Thousands of retirees are choosing
an ADU over expensive retirement
homes in California

Thousands of retirees
are choosing an ADU over
expensive retirement homes
in California

No Cookie Cutter ADUs Here - Each One is Uniquely Yours

You can customize or create your own floor plans for a truly personalized ADU in San Mateo.

Why Us?

Why Build with Imkat Homes?

Find out why Imkat Homes is the Number 1 Rated ADU Builder in San Mateo

Vacaville #1 ADU Builder

General Contractors

Other ADU Contractors

Specializing in ADUs

ADU Built in Just 8 Months

Financing

3 Months of Free Assisted Living for Retirees

Over 200+ ADUs Built

Finance Your ADU for $1,500 a month

Learn how easy it is to finance your ADU in San Mateo

General Contractors

Other ADU Contractors

Specialize in ADUs

Free Assisted Living

Financing

200+ ADUs Built

Why San Mateo Homeowners Trust Imkat Homes for ADUs

At Imkat Homes, we understand the unique needs of San Mateo property owners. Our team is dedicated to designing and building ADUs that meet local regulations while seamlessly blending with your home’s aesthetics. Here’s why we’re the preferred ADU builder in San Mateo:

Expertise in San Mateo ADU Regulations

Building an ADU in San Mateo requires an in-depth understanding of zoning codes, lot size requirements, and permits. Our team is highly experienced in navigating San Mateo’s ADU regulations, ensuring your project is completed efficiently and legally.

Customized Designs for Every Property

We don’t believe in one-size-fits-all solutions. Whether you need a modern studio for personal use or a spacious two-bedroom rental, we customize every ADU to suit your property, lifestyle, and budget.

Turnkey ADU Solutions

From design and permitting to construction and finishing touches, we provide end-to-end ADU services. Our streamlined process ensures a hassle-free experience from start to finish.

Affordable, High-Quality Construction

We offer competitive pricing without compromising on quality. Using durable materials and energy-efficient solutions, we ensure your ADU is built to last.

Benefits of Building an ADU in San Mateo

Rental Income

With high demand for housing in San Mateo, an ADU can serve as a profitable rental unit.

Multi-Generational Living

Create a private space for family members or guests.

Boost Property Value

Increase the resale value of your home with a functional ADU.

Flexible Space

Use your ADU as a home office, guest house, or creative studio.

San Mateo ADU Regulations Made Simple

The City of San Mateo has specific guidelines for ADU construction, and we’ll ensure your project is fully compliant:

Maximum ADU Size:

 ADUs can be up to 1,200 square feet, depending on your property’s size.

Setback Rules:

A minimum setback of 4 feet is required from side and rear property lines.

Parking Requirements:

One parking space is generally required unless exemptions apply (e.g., near public transit).
Our team will handle the permitting process and work closely with the City of San Mateo to ensure your ADU project moves forward without delays.
Have a Question?

FAQ

An ADU is a self-contained living unit that is either attached or detached from a primary residential dwelling. It is also commonly known as a granny flat, in-law suite, backyard cottage, or secondary dwelling unit.

Most counties in the surrounding Vacaville area allow you to build up to 1200 square feet per lot. As long as it fits on your property. 

You can build up to two units per property or as long as both units do not exceed 1200 square feet. Such as two 600 SQFT units.
 
Depending on the size it typically takes 3-5 months for your permits plans and Design and 3-4 months for construction. 

Yes, ADUs can be rented out for additional income. However, local regulations may place restrictions on renting out ADUs, such as requiring a permit or limiting the number of occupants.

Unlock Your Property’s Potential – Get a Free ADU Consultation!

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