Home Additions

Home Addition Contractor in San Mateo

ADUs, garage conversions, room additions, and full second-story builds, designed and built in-house.

Warranty
1 Year

Build on the Home You Have, Not a New One

Adding space to the home you already own costs less, disrupts less, and returns more than relocating, which matters on a Peninsula lot where replacement cost is the real alternative. RP Restoration plans and builds additions that integrate with your existing structure, match the architecture you have, and meet City of San Mateo zoning and setback requirements.

From Single-Room Additions to Full Second-Story Builds

We handle the full scope of residential additions, whether you need a self-contained ADU, a converted garage, a pool house, or a second story.

ADU Remodeling

Permitted ADU construction that adds rentable or livable square footage without altering the character of your existing home.

Garage Remodeling

Full garage conversions and remodels that turn underused square footage into functional living, working, or dedicated storage areas.

Pool Remodeling

Pool house additions and surrounding hardscape built to complement your outdoor living space and protect your investment.

The RP Restoration Addition Process

Every addition we build follows the same four-phase structure. Clear scope, fixed pricing, and a project manager accountable for every phase.

Consultation

We assess your property, review zoning and setback requirements, and document the full scope before any estimate is prepared.

01

Design Drafting

Our in-house architects and designers produce drawings and material specifications tailored to your home's existing structure and your project goals.

02

Blueprints & Permitting

We prepare permit-ready documentation, submit applications to the City of San Mateo Building Division, and manage the approval process through to construction clearance.

03

Construction

Your project manager oversees every trade in-house. You receive daily photo and video updates, milestone check-ins, and a final walkthrough before handover.

04

Our Latest Addition Projects

The Four-Season Screened Porch

Expand Your Home With a Team That Delivers on Every Detail

Every addition RP Restoration builds is managed in-house, scoped with full transparency, and held to the highest standard of craftsmanship. No subcontractors. No guesswork. One team from permit to final walkthrough.

Ready to Add Space to Your Home?

Tell us about your project and we will assess your property, review zoning, and provide a fixed, itemized estimate before any work begins.

 Frequently Asked Questions

Do home additions in San Mateo require permits?

Yes. All additions require a permit from the City of San Mateo Building Division, or from San Mateo County Planning and Building for unincorporated parcels. RP Restoration prepares all documentation and manages every submission on your behalf.

We build ADUs, room additions, second-story additions, pool houses, and garage remodels. Every project is designed and constructed by our in-house team.

Every addition is quoted with a fixed, itemized estimate covering design, materials, labor, and permit costs. No hidden fees and no surprise change orders.

What Our Clients Say

Licensed, Local, and Accountable Across San Mateo County

We serve homeowners in San Francisco, San Mateo, Burlingame, Hillsborough, Millbrae, Palo Alto, Menlo Park, Atherton, Redwood City, San Carlos, Daly City, and surrounding Peninsula communities.

Insurance Claim Assistance, California

We work directly with insurance companies and provide insurance-compliant documentation to help support your claim.

RP Restoration provides restoration services and insurance claim assistance but does not act as a public adjuster. Insurance coverage and payments are determined by the insurance carrier and policy terms.

Explore Our Other Services

We're Ready to Help You Anytime

Our team is always available to guide you through your project needs. We're here to make your journey simple and stress-free.

Ask Us Anything!