Home Addition Construction Cost San RafaelHome Addition Construction Cost San RafaelHome Addition Construction Cost San RafaelHome Addition Construction Cost San RafaelHome Addition Construction Cost San RafaelHome Addition Construction Cost San RafaelHome Addition Construction Cost San RafaelHome Addition Construction Cost San RafaelHome Addition Construction Cost San RafaelHome Addition Construction Cost San Rafael

Home Addition Construction Cost in San Rafael, CA

Detailed pricing guide with local market adjustments and material comparisons

San Rafael Average

$40,000–$150,000

Market Tier

Mid-Size City

Cost Breakdown

Home Addition Construction Cost in San Rafael

Mid-Size City

LowAverageHigh

$40,000$95,000$150,000

Market Tier

Mid-Size City (1x)

Mid-size city with average market costs

Material Cost Comparison

Foundation concrete(Budget)

$30,000–$112,500

Framing lumber(Mid-Range)

$40,000–$150,000

Roofing materials(Premium)

$56,000–$210,000

Factors that affect your cost

Addition size (square footage)
Number of stories
Foundation type
Roofing integration with existing
Plumbing and electrical scope
HVAC extension
Architectural design
Permit and engineering fees
Interior finish level
Landscaping restoration

Get Quotes in San Rafael

Founding Member

Premium spot in San Rafael

Ambassador

Lead the San Rafael community

Founding Member

Premium spot in San Rafael

Search for remodelings in San Rafael →

San Rafael Housing Market

Median Home Price

$1,250,000

Homes for Sale

104

Price per Sq Ft

$640

Local Pros

496

Home Service Professionals Near San Rafael

Landscapers 71lender 70Stagers 66Painters 63Cleaners 61Flooring 60multimedia_specialist 53Plumbers 52

Median Household Income

$109,317

Median Home Value

$1,246,200

Median Rent

$2,346/mo

Homeownership Rate

51.8%

Population

60,604

Median Year Built

1968

Source: U.S. Census Bureau, ACS 2023 5-Year Estimates

Track Your Costs

Renovation

Home Addition Construction

Date

April 2026

Cost

$95,000

Vendor

Your local pro

Warranty

10-year material warranty

San Rafael average: $40,000–$150,000

Before

Issue documented with photos

After

Repair completed, area sealed

Materials Used

Foundation concreteFraming lumberRoofing materialsWindows and doors

Warranty Details

10-year material warranty

Auto-Checkup Created

"Addition Inspection" — every 24 months

Added by youApril 2026

Property Health Score

Good

interior category +20 pts(65 → 85)

Documentation19/25

Maintenance20/25

Warranty22/25

Investment21/25

Your health score is calculated based on documentation completeness, maintenance currency, warranty coverage, and investment tracking.

Track this repair in PropDoctor →

Get a Personalized Estimate

Find a remodeling near me

I found several remodeling contractors in your area. Here are the top results:

Professionals Found

12 results

Smith & Sons

Connected

remodeling contractor

4.9(47)

BookQuote

J&R Home Services

remodeling contractor

4.7(23)

From $95/hr

MessageView

View All in ProPortal

Log my home addition construction in PropDoctor

I'll help you log this. I've pre-filled the details — review and submit:

Add to Property History

remodeling contractor

Title:remodeling

Category:remodeling contractor

Date:2026-04-10

Fill Form & Review

Fill Form & Submit

SmartSearch understands 51 action types across scheduling, vendor discovery, and home maintenance.

Try SmartSearch →

Cost FAQ

What is the average cost of home addition construction in San Rafael?

The average cost of home addition construction in San Rafael, CA ranges from $40,000 to $150,000. The final price depends on Addition size (square footage), Number of stories, Foundation type.

What factors affect home addition construction cost?

Key factors include: Addition size (square footage), Number of stories, Foundation type, Roofing integration with existing, Plumbing and electrical scope, HVAC extension, Architectural design, Permit and engineering fees, Interior finish level, Landscaping restoration. In San Rafael, local labor rates and material availability also influence pricing.

How do I get accurate quotes for home addition construction in San Rafael?

Get at least 3 quotes from licensed professionals in San Rafael. Use Fizbo SmartSearch to find and compare local remodelings, read reviews, and request estimates — all in one place.

Explore San Rafael, CA

Homes for Salein San Rafael Rentalsin San Rafael Home Servicesin San Rafael Maintenance Guidesin San Rafael Find Professionalsin San Rafael

Home Addition Construction Cost in Nearby Cities

San Francisco, CA Oakland, CA Santa Rosa, CA Hayward, CA Vallejo, CA Concord, CA

Home Addition Construction Cost in San Rafael, CA

Cost Breakdown

Home Addition Construction Cost in San Rafael

Material Cost Comparison

Get Quotes in San Rafael

San Rafael Housing Market

Track Your Costs

Home Addition Construction

Property Health Score

Get a Personalized Estimate

Cost FAQ

More Cost Guides for San Rafael

Full Roof Replacement Cost

HVAC System Installation Cost

Foundation Crack Repair Cost

Kitchen Remodeling Cost

Bathroom Remodeling Cost

Explore San Rafael, CA

Home Addition Construction Cost in Nearby Cities