Home Additions in San Francisco | Expert Room Addition Contractor

Expand your home with a thoughtfully designed addition built for long term comfort and value. Turquoise Home Remodeling specializes in high quality home additions in San Francisco, including second floors, guest suites, sunrooms, and custom living spaces. Our team ensures every detail integrates smoothly with your home’s design while adding usable square footage.

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Licensed & Insured

Structured Process

Clear Communication

24/7 Emergency Services

Our Home Addition Services

We provide comprehensive design-build services covering every popular type of home expansion in San Francisco’s unique residential landscape.

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Before and after view of a custom home addition in san francisco with new sunroom, updated siding, and landscaped backyard

Custom Room Additions

Personalized room additions and extensions that create larger kitchens, dining areas, master suites, home offices, or family rooms, with seamless interior design and integration into existing walls and flooring.

Second story home addition under construction in San Francisco

Second-Story Additions

Sophisticated vertical home expansions that add entire floors, requiring expert reinforcement of the existing foundation, construction of a new roof structure, and precise matching of windows and doors for architectural harmony.

Garage and basement addition in San Francisco home

Garage & Basement Additions

Transformative garage additions for vehicles, workshops and basement additions that turn underutilized areas into bright rec rooms or guest quarters with proper waterproofing, HVAC installation, & electrical work.

Sunroom and custom deck addition in San Francisco home

Sunrooms & Deck Additions

Relaxing sunrooms bathed in natural light through expansive windows & custom deck additions built with durable materials for outdoor dining or lounging, often complemented by minor landscaping enhancements & exterior renovation.

Detached ADU with private entrance in San Francisco backyard

Accessory Dwelling Units (ADUs)

Fully independent units attached, detached, or garage conversions with complete plumbing work, electrical work, separate doors, and efficient HVAC installation for rental income or extended family.

Sunroom and deck addition on San Francisco home

Specialty & Combined Projects

Bump-outs, in-law suites, or hybrid projects combining multiple elements like a sunroom with a deck addition for enhanced indoor-outdoor flow and expanded functional living space tailored to your lifestyle needs.

Full home expansion project in San Francisco neighborhood

Full-Scale Home Expansion Projects

Large-scale renovation and home remodeling that incorporates every trade under our general contractor oversight, from initial architect concepts to final city inspector approval.

Why Choose Us for Home Additions in San Francisco

San Francisco homeowners repeatedly trust Turquoise Home Remodeling for their home remodeling and home expansion projects because we function as a true one-stop general contractor, bringing together every necessary specialist under unified management. As a fully licensed and insured company, we expertly handle the city’s notoriously complex permitting process, seismic requirements, zoning restrictions, and historic preservation rules that often challenge home additions and San Francisco projects.

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Proven Expertise & Experience

With over 15 years of experience, our team has completed hundreds of room additions across San Francisco — from small lot extensions to full second-story and garage conversions. We skillfully integrate new structures with existing foundations, roofing, walls, and finishes while preserving safety and design integrity.

Authoritative Craftsmanship

Each project starts with collaboration between our in-house architects and structural engineers to ensure structural safety, seismic compliance, and adherence to California building codes. Our designers refine the style, while skilled builders, electricians, plumbers, and HVAC technicians handle precise construction and system installations for lasting comfort and performance.

Trustworthy & Transparent

Trustworthy & Transparent

We prioritize clear communication through detailed proposals, weekly progress reports, protected work sites, and coordination with city inspectors. Our outstanding reviews and A+ Better Business Bureau rating reflect our consistent reliability and accountability.

Customer Satisfaction

Customer-Focused Results

We start by understanding your specific needs, whether adding a peaceful sunroom, building a multi-purpose deck addition, creating a rental-ready ADU, or expanding with a full extension, and deliver tailored solutions backed by a comprehensive one-year warranty plus extended structural and manufacturer guarantees.

Fair and Upfront Pricing

We offer competitive, completely transparent pricing for all home additions in San Francisco, CA, with fully itemized quotes that account for every phase from design to final inspection.

Our Booking Process

  • Phone Call
    A relaxed, no-pressure conversation to explore your vision, whether a cozy sunroom, functional garage addition, or ambitious second-story addition,n along with budget, timeline, and space requirements.
  • In-Home Consultation
    Our general contractor, architect, and designerwill visit to evaluate your current foundation, roof structure, utilities, lot setbacks, and potential for various extensions.
  • Design Meeting
    In-depth session reviewing floor plans, 3D renderings, material choices for flooring, windows, doors, and style options that complement your home’s character.
  • Personalized Design Plan
    You receive a thorough proposal developed with structural engineer input, including engineered drawings, detailed specifications, energy analysis, and a complete cost breakdown.
  • Final Contract
    A straightforward, comprehensive agreement outlining scope, warranties, payment schedule, permit strategy, and coordination of all specialists, carpenters, electricians, plumbers, and HVAC technicians.
  • Construction Begins
    Work starts promptly with full site protection, phased scheduling, and ongoing communication from your dedicated project manager.
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Contractor working inside San Francisco home renovation site

Over Work Process

A clear, step-by-step remodeling process designed for transparency, quality, and peace of mind from start to finish

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Initial Consultation & Planning

Collaborative sessions with our architect and designer to define functionality, aesthetics, interior design preferences, and long-term goals for the new space.

Site Assessment & Measurement

Comprehensive evaluation by a structural engineer of the existing foundation, walls, roof structure, soil conditions, and utility locations to identify opportunities and constraints.

Design & Permits

Detailed architectural plans were created and expertly submitted to the San Francisco Department of Building Inspection for swift approval.

Site Preparation

Professional shoring, foundation protection, dust barriers, and courteous neighbor notifications.

Demolition & Removal

Careful, controlled removal of any existing elements required for the extension or addition.

Structural Work & Framing

Precision construction of new foundation elements, load-bearing walls, and roof structure by experienced carpenters and builders.

Rough-In Systems

Licensed electricians, plumbers, and HVAC technicians install all necessary electrical work, plumbing work, and climate control systems.

Interior Finishing

Expert installation of flooring, drywall, trim, cabinetry, paint, lighting, and custom interior design details.

Final Inspection & Handover

Thorough review with city inspectors, quality assurance checklist, complete cleanup, and a personalized orientation plus maintenance guide.

Brands We Work With

We select only premium, warrantied brands proven for San Francisco’s demanding conditions.

Our trusted partners include

These partnerships guarantee longevity and performance in every home expansion.

Locations

Turquoise Home Remodeling serves all of San Francisco, CA, with specialized knowledge of neighborhood-specific styles and microclimates.

Serving San Francisco & Surrounding Areas

We complete exterior remodeling in neighborhoods, including

Richmond

Sunset District

Ingleside

Diamond Heights

Haight-Ashbury

Western Addition

Cow Hollow

Financial District

Mission District

Bayview/Hunters Point

Outer Mission

San Francisco Zip codes

94118

94121

94111

94116

94112

94103

94122

94112

94132

94132

94131

94117

94114

94110

94127

94115

94115

94117

94119

94123

94124

94104

94105

94108

94133

94110

94124

Service Availability – Home Additions

If your neighborhood isn’t listed, there’s a strong chance we’re already working on a home addition nearby. Our licensed and insured team provides custom home addition services throughout San Francisco and surrounding Bay Area communities, with our service areas continuing to grow as more homeowners choose us for their expansion projects.

Whether you’re planning a room addition, second-story build, garage conversion, or in-law unit, we’re ready to help.

Contact us today to confirm availability in your area and speak directly with our experienced home addition specialists.

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Home Addition Transformations

Explore the impressive results of our custom home addition projects. Each project highlights how we transform underutilized spaces into seamless, spacious, and beautifully integrated living areas that enhance comfort, functionality, and long-term home value.

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Testimonials

Hear from homeowners who expanded their living space with our custom home addition services. Their feedback reflects our commitment to structural precision, cohesive design, and well-managed construction from planning through completion.

Other Services

In addition to custom home additions, we offer a full range of residential remodeling services to enhance comfort, functionality, and long-term property value. Explore our complementary solutions designed to seamlessly improve and transform your home.

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Modern kitchen remodel in San Francisco featuring a dark navy blue center island with white quartz countertops, custom white cabinetry, and a brick tile backsplash

Kitchen Remodeling

We create updated kitchens with better functionality, improved layouts, and finishes that match your style.

Bathroom Remodeling

Our bathroom remodeling services focus on efficient design, modern features, and everyday comfort.

Finished basement remodel with sectional sofa, custom entertainment wall, built in fireplace, and wet bar

Basement Remodeling

Turn your basement into a finished, livable space that adds flexibility and value to your home.

Newly remodeled home exterior with modern siding, covered front porch, stone columns, and updated landscaping

Exterior Remodeling

Exterior upgrades that strengthen your home’s structure while giving it a more attractive, refreshed look.

Blue two-story home exterior renovation with white trim, stone columns, covered porch, and professional landscaping

Siding Remodeling

Durable siding solutions that improve insulation, protect against weather, and upgrade curb appeal.

Custom multi-level deck remodeling in San Francisco with built-in fire pit, outdoor seating area, dining space, and hillside city views at sunset

Deck Remodeling

We design and remodel decks to provide sturdy, low-maintenance outdoor spaces for relaxing or hosting.

Professional contractor cleaning and installing rain gutters on a San Francisco home roof to improve drainage and exterior protection

Gutters Remodeling

Gutter systems designed to manage rainwater properly and help prevent long term water damage.

Professional tile installation in a modern bathroom with large format wall tiles and precise grout lines in a San Francisco home

Tile Installation

Clean, professional tile installation that enhances surfaces with lasting strength and visual appeal.

Professional roofing installation in San Francisco with contractor installing asphalt shingles on a residential home

Roofing Installation

Reliable roofing installation that protects your home and improves overall energy performance.

Licensed plumber repairing kitchen sink pipes under cabinet in San Francisco home

Plumbing Services

Complete plumbing support for new installations, repairs, and system improvements throughout the home.

Licensed electrician testing wall outlet wiring with multimeter

Electrical Services

Safe and efficient electrical work covering upgrades, installations, and essential system maintenance.

Professional painter applying blue paint to interior wall in San Francisco home

Painting Services

Professional painting services that refresh interior and exterior spaces with smooth, durable finishes.

FAQs – Home Additions in San Francisco

Find answers to common questions about home addition projects, timelines, and materials.

Costs depend on type and scope: simple room addition or extension $200K–$400K, second-story addition $400K–$800K+, sunroom or deck addition $100K–$300K, ADU $250K–$600K.

6–18 months total, including architect design and permitting; actual construction 4–12 months.

Full structural engineer review and upgrades for foundation, walls, and roof structure.

Absolutely, with seamless exterior renovation and optional landscaping integration.

All San Francisco neighborhoods.