Compare the highest-rated insulation professionals in San Mateo, California. All contractors are licensed, insured, and verified through our rigorous screening process.
A highly specialized and well-regarded company focusing primarily on attic services, including comprehensive insulation solutions, air sealing, and rodent proofing. They are known for their professional crews, detailed energy efficiency consultations, and clean installation practices. They serve the entire San Mateo area.
Attic Crew has built an exceptional reputation for attic and insulation services on the Peninsula. They emphasize a science-based approach to home performance, often combining insulation upgrades with advanced air sealing to maximize energy savings. Their reviews consistently praise their professionalism and effectiveness.
While based slightly north, Attic Solutions is a major player serving the entire San Francisco Bay Area, including San Mateo. They offer a wide range of insulation services and are particularly noted for their expertise in both spray foam and blown-in cellulose/fiberglass. They are well-versed in local rebate programs.
** The insulation market in San Mateo is characterized by high-quality, specialized contractors who understand the unique climate and building codes of the San Francisco Peninsula. The competition is strong among a handful of established leaders, which drives high service standards. Due to the high cost of living and labor, pricing is at a premium compared to national averages. Homeowners can expect to pay between $1.50 - $4.50 per square foot for blown-in attic insulation, while spray foam projects can range from $3,000 to over $10,000 depending on the scope. There is a significant focus on comprehensive home performance, with air sealing being a standard recommendation alongside insulation upgrades. Providers are generally very knowledgeable about local rebates available through programs like BayREN, making energy efficiency upgrades more accessible.
4.7+ star average from verified customer reviews
All contractors are properly licensed and insured
10+ years average experience in the industry
Familiar with San Mateo regulations and climate
Get answers to common questions about insulation services in San Mateo, California.
For a standard 1,500 sq. ft. attic in San Mateo, adding blown-in cellulose or fiberglass insulation to achieve a recommended R-38 (for our Climate Zone 3) typically ranges from $1,800 to $3,500. Costs vary based on material choice, existing insulation removal, attic accessibility, and the contractor. Homeowners should also explore rebates from Bay Area programs like BayREN and federal tax credits, which can significantly offset the investment.
The ideal time is during our mild, dry season from late spring through early fall (May to October). This period offers predictable weather for contractors to work efficiently and allows you to address insulation needs before the cooler, damper winter months. Scheduling during this window can also be easier, as it avoids the pre-holiday rush many contractors experience.
Yes, insulation work must comply with the 2022 California Title 24 Building Energy Efficiency Standards. These mandate specific minimum R-values for different parts of the home (e.g., R-38 for attics, R-13 for walls) and address whole-house performance. Additionally, any work involving duct sealing or replacement in attics must follow strict sealing requirements. A reputable local contractor will be fully versed in these codes and pull the necessary permits from the City of San Mateo.
Prioritize contractors who are licensed (check their CSLB number), insured, and have strong local references. Look for specialists who perform a comprehensive energy audit or assessment first, as this identifies specific air leakage points and moisture issues common in our coastal-influenced climate. Ensure they provide detailed quotes that include material specifications (R-value), labor, cleanup, and information on applicable rebates.
Absolutely. Proper insulation is a year-round solution for San Mateo's climate. It creates a thermal barrier that keeps indoor temperatures stable, retaining warmth during cool, foggy periods near the coast and blocking heat gain during warmer, sunnier days inland. Combined with proper air sealing, it reduces the workload on your HVAC system, enhancing comfort and lowering energy bills in both summer and winter.