Room Addition San Diego
open_in_full Master Suites & Second Stories

Love Your Home.
Just Add More Of It.

Outgrown your current space but don't want to move? A high-end room addition seamlessly integrates new square footage into your existing architecture.

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Cheaper Than Moving

Between agent fees, closing costs, and the San Diego market premium, adding on to your current home typically costs 40–60% less than buying a bigger one.

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Stay in Your Neighborhood

You've built your life around your community — the schools, the commute, the neighbors. An addition lets you keep all of it while gaining the space you need.

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Instant Equity Boost

Every square foot added is a direct increase in your home's appraised value. Most additions recoup 60–80% of their cost immediately at resale.

Addition Types

We handle everything from ground-floor expansions to full second-story pop-tops.

Second Story Addition San Diego
Most Popular

Second Story

Double your living space without sacrificing yard. Bedrooms, bathrooms, and living areas built directly above your existing footprint.

Ground Floor Room Addition San Diego

Ground Floor Expansion

Extend your kitchen, add a family room, or create an open-concept living area that flows naturally from your existing home.

Master Suite Addition San Diego

Master Suite + Bath

A spa-like primary suite with walk-in closet, luxury bath, and private retreat—all built seamlessly onto your home.

Everything Under One Roof

As a design-build firm, we handle the entire project from initial concept to final walkthrough. No juggling architects, engineers, and contractors separately.

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Architectural Plans

Custom floor plans and 3D renderings designed to blend seamlessly with your existing architecture.

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Structural Engineering

Full structural analysis and Title 24 energy compliance to meet California building codes.

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Permitting

We navigate San Diego's planning departments so you never stand in line at the county office.

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Foundation & Framing

New footings, concrete work, and precision framing that ties into your existing structure.

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Electrical & Plumbing

Full rough-in and finish work for new bathrooms, kitchens, and living spaces—all code compliant.

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Roofing & Exterior

Matched roofing, siding, and stucco so the addition looks like it was always part of the home.

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Interior Finishes

Flooring, cabinetry, countertops, tile, and paint—all designer-curated and premium quality.

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Final Inspections

We handle every city inspection and deliver a fully signed-off, move-in ready space.

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500+
SQ FT ADDED

Seamless Integration

The hallmark of a great room addition is when guests can't tell where the original home ends and the new space begins. That's our standard.

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Matched Materials

We source identical or complementary roofing, siding, trim, and stucco so the addition is indistinguishable from the original build.

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Structural Integrity

Our in-house engineers ensure the new structure ties into your existing foundation and framing with zero compromise.

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Live-In Construction

Most of our addition clients stay in their homes during construction. We manage dust, noise, and access to minimize disruption.

See Our Process arrow_forward
videocam Free Virtual Consultation

Ready to Build Your Room Addition?
Let's Build Something Great.

We start every addition project with a quick, no-pressure video call, not a high-pressure in-home sales appointment. Just a real conversation about your home, your goals, and what expansion options make sense.

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How It Works

15-minute video call • No commitment • Expert advice

Pick a time that works for you using the calendar. We'll send you a video call invite and talk through your addition goals, timeline, and budget from the comfort of your couch.

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4891 Ronson Ct Suite C, San Diego, CA 92111

Serving All of San Diego County

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Direct Line

(858) 788-3839

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Email Us Your Plans

info@crsbuildersinc.com

We can start in 2 weeks if you have approved plans! Plus, ask about our approved plan discount.

Project Details