ADU

Expanding Your Living Space with Purpose

An Accessory Dwelling Unit (ADU) is a smart way to add usable living space while boosting your property’s value. Whether you’re planning a guest house, rental unit, in-law suite, or private workspace, Happy Homes Construction helps turn that idea into a well-designed, fully functional space. We know ADU projects can feel overwhelming with all the planning, permits, and construction involved. That’s why our team stays with you every step of the way, offering guidance and clear support from start to finish. Our goal is an ADU that fits naturally with your property while meeting your everyday needs.

Licensed & Insured in California
10+ Years of Experience
Licensed & Insured in California
Licensed & Insured in California

Planning, Design & Full ADU Construction

Every ADU begins with careful planning and design. We assess your property, available space, and intended use to create a layout that makes the most of every square foot — whether that’s a compact studio or a full one-bedroom unit, with a focus on smart layouts, natural light, and modern function.

We manage the complete build from start to finish: site prep, framing, plumbing, electrical, insulation, flooring, and interior finishes. We help you choose durable, energy-efficient materials and finishes that support long-term use, with every element built to code and installed with precision for a polished result.

California License #1150269

Woman-owned, family-managed general contractor

Built for Comfort, Compliance & Long-Term Value

Quality and compliance are essential in ADU construction. Our experienced professionals follow a structured workflow to ensure the project stays on schedule, meets local building regulations, and maintains high standards of craftsmanship. Clear communication throughout the project keeps you informed and confident at every step.

A professionally built ADU provides long-term benefits, including additional living space, rental income potential, and increased property value. With Happy Homes Construction, you can expect a smooth, stress-free process and an ADU designed for comfort, durability, and lasting value.

Minor Carpentry

Trim, framing touch-ups and small woodwork repairs finished cleanly and built to last.

Drywall Repairs

Holes, cracks and damaged sections patched, sanded and blended into the surrounding wall.

Door & Window Adjustments

Sticking doors, misaligned frames and stiff windows adjusted so everything opens smoothly.

Fixture Installation

Lights, fans, hardware and household fittings installed securely and correctly the first time.

Shelving

Custom and ready-made shelving mounted level, anchored properly and ready to hold weight.

Painting Touch-Ups

Scuffs, patches and worn areas refreshed with a colour match that disappears into the wall.

General Maintenance

Seasonal upkeep and the running to-do list, cleared in a single organised visit.

Home Improvements

Small upgrades that improve how your home looks, works and feels day to day.

Multi-Task Visits

Have a list? We schedule it as one job so the whole thing gets finished together.

10+Expert workers on call

RELIABLE FROM THE FIRST CALL TO THE FINAL CHECK

Happy Homes Construction handles ADU projects with the same care and precision as every remodel we take on. Our team manages planning, permits, and construction efficiently, keeping the process organized and on track. We focus on quality workmanship while keeping you informed at every stage of the build.

Clear communication — you always know what’s happening and when.
Permit & planning support — we guide you through the entire process.
A clean work environment— maintained throughout the job.
Built to last— durable materials chosen for long-term value.

Add Space Today, Add Value for Years to Come

A well-built ADU does more than add square footage — it adds flexibility, rental potential, and long-term value to your property. With Happy Homes Construction, you gain a reliable partner who handles the details from start to finish, so the finished space fits your life and your home.

ADU Construction Areas We Serve

We provide adu construction across San Mateo County and the Peninsula. Find details for your city:

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Schedule a consultation with our experienced team and take the first step toward a home that reflects your lifestyle and values.