Top Rated Home Energy Auditors Serving San Lorenzo, CA

If you really care about choosing a quality home energy auditor, we’re here for you. Here’s your access to the best home energy auditors serving San Lorenzo including 94580. These energy experts provide indoor air quality assessments and insulation assessments, and they also work on energy conservation recommendations, appliance energy consumptions and energy usage analyses. For 22 years we’ve conducted the most accurate ratings and deepest research of local companies, so you’ll be confident in choosing.

  • Last Updated May 15, 2026
  • 2,196 people sourced companies in Home Energy Auditor
    278 Verified Home Energy Auditor Customers Surveyed
278
2,196
1 of 2

CalRATERS, Inc.

hidden

CalRATERS, Inc. offers a variety of services that are designed to meet the energy needs of residential clients in the entire Bay Area. In addition to ...
Read More

Main Services

Home Energy Auditor
loarrowgo

Additional Services

Title 24 HERS Inspections, Home Energy Audits, BayREN Rebate Program Processing & Submittals, Energy Compliance Certificates, Duct Leakage Testing, Envelope Leakage Testing, Infrared Imaging, Insulation Inspections

Coverage Areas

Bay Area

Family Owned
Family Owned
Established in 2015
Established in 2015
Special Discount
Special Discount
Live Phone Call Answers
Live Phone Call Answers
Diamond Certified Video Profile
Home Energy Auditor - CalRATERS, Inc. - Bay Area
youtube
Diamond certified resource logo
Diamond Certified Company Report
Marty Kerr, Owner-CalRATERS, Inc.
Marty Kerr, Owner
Expert Contributions
ratings icon
  • 53
  • Rating Surveys
video icon
  • 15
  • Photos
    & Videos
articles icon
  • 5
  • Researched Articles
Hours CLOSED NOW
2 of 2

Hassler Heating & Air Conditioning, LLC

hidden

Hassler Heating & Air Conditioning, LLC is leading the way in California’s electrification efforts, providing comprehensive HVAC services that include...
Read More

Main Services

Heating & Air Conditioning
loarrowgo
Home Energy Auditor
loarrowgo

Additional Services

Central Ducted Heat Pump, Ductless Mini-Split Heat Pump, Water Heater (Standard, Tankless, Heat Pump, Electric Resistance), Furnace, and A/C Installations and Repairs, Home Energy Assessments and Home Energy Score (HES) Assessments, Energy Upgrade Measures (Building Shell)

Brands

Bosch, Carrier, Mitsubishi, Navien

Coverage Areas

Alameda County, Contra Costa County, Marin County

Family Owned
Family Owned
Established in 1999
Established in 1999
Residential & Commercial
Residential & Commercial
Financing Available
Financing Available
Diamond Certified Video Profile
Heating & Air Conditioning - Hassler Heating & Air Conditioning, LLC - Alameda County
youtube
Diamond certified resource logo
Diamond Certified Company Report
Marcus Muller, General Manager-Hassler Heating & Air Conditioning, LLC
Marcus Muller, General Manager
Expert Contributions
ratings icon
  • 313
  • Rating Surveys
video icon
  • 45
  • Photos
    & Videos
articles icon
  • 5
  • Researched Articles
  • Quick Connect
Hours CLOSED NOW
License:
770180
Learn how to choose a Home Energy Auditor and more…

Diamond Certified Home Energy Auditors Serve These San Lorenzo ZIP Codes

94580

Diamond Certified Home Energy Auditors In San Lorenzo

Diamond Certified home energy auditors serving San Lorenzo are rated an average of 4.5 out of 5 stars based on 303 reviews of 4 rated home energy auditors.
Diamond Certified home energy auditors in San Lorenzo Avg. Star Rating.

We make you an expert at choosing a high-quality home energy auditor in the San Lorenzo area.

For those who love quality local home energy auditors.

Within our Diamond Certified Resource:

You’ll love and refer your friends and family to your new San Lorenzo area Diamond Certified home energy auditor. They provide expert services, including carbon footprint analyses, Green building assessments, energy management consultations, energy conservation education, renewable energy options, and more.

To qualify for Diamond Certified, each company must score Highest in Quality and Helpful Expertise (a 90+ on a 100 scale) and pass all our credential-based ratings. Diamond Certified home energy auditors that serve San Lorenzo residents include Hassler Heating & Air Conditioning, LLC, and CalRATERS, Inc..

Every Diamond Certified home energy auditor that serves residents in 94580 performs various specialties, including energy-efficient lighting analyses, weatherization suggestions, insulation assessments, HVAC system evaluations, and indoor air quality assessments.

How to Choose a Quality San Lorenzo Home Energy Auditor for Your Family
  1. Click the name of the company to get to their Diamond Certified Company Report page.
  2. Watch their Diamond Certified Video Profile and other videos that we’ve created for you.
  3. Read their verbatim client survey responses and our researched articles.
  4. Get helpful home energy auditing tips if they are a Diamond Certified Expert Contributor.
  5. Call or email them to schedule an appointment.
Become a Diamond Certified Preferred Member and Join Your San Lorenzo Neighbors

If you love quality local companies, this is for you. Become a Diamond Certified Preferred Member (always free) and get a double performance guarantee, extra guides and tips, our annual Diamond Certified Directory, and more.

Your Diamond Certified Resource. We make you an expert at choosing.

We make you an expert at choosing local companies by giving you the most accurate ratings, deeply researched company reports and Diamond Certified Guide of all Resource Guides, which cover 70+ industries in the Auto, Home, Health and Personal service categories. Each guide contains 16 key articles that are separated into “Before, During and After the Job” tabs. These are written to guide you through each phase of hiring, starting, managing and ending a job in that specific type of service.

Diamond Certified Resource Compared to Crowd-Sourced Review Sites

Diamond Certified Resource’s ratings of local companies are based on surveys of only verified real customers, so they are the most accurate. This beats crowd-sourced review sites like Yelp, Angi or even Google that are plagued with fake, manipulated, cherry-picked and non-customer reviews, which produce inaccurate and often inflated rating scores.

Diamond Certified Resource’s deeply researched reports of top rated Diamond Certified companies include everything you need to see to be very confident in choosing a top rated local company. Each company report includes detailed quality ratings and scoring, verbatim customer survey responses, a profile video, a company story video, a capabilities table, a photo gallery, researched articles, unique expert contributions from the company’s owner, and more. This beats crowd-sourced review sites that solicit companies to “claim their business listing” and add any type of info to their profiles. This sounds good, but it has led to company profiles that are littered with false claims and incomplete info.

Map of San Lorenzo, CA

San Lorenzo was founded in 1869, and today, your 24,926 neighbors enjoy apple picking, hiking, cafes, swimming and outdoor sports. San Lorenzans use Diamond Certified home energy auditors for HVAC system evaluations, energy assessments, carbon footprint analyses, energy conservation recommendations, energy management consultations, and more.

Frequently Asked Questions for Home Energy Auditor in San Lorenzo, CA
Q: What are clients of Diamond Certified home energy auditors saying about companies in San Lorenzo, CA?
A: Verified CalRATERS, Inc. Customer, 1 of 44
"I always give them my highest approval that they will be happy with them and they won't have any problems using them. They are highly recommended. They make my life easy and they take care of everything for me, including the permits. They schedule everything with the city and they work everywhere that we need." - Rachel A.
All Survey Responses for CalRATERS, Inc.
Verified Hassler Heating & Air Conditioning, LLC Customer, 1 of 313
"They are amazing. I needed work done within a certain time frame, and they were able to get someone on the jobsite and completed the work within the time frame that I had. I liked that they were efficient, the staff and their service." - Jasmine S.
All Survey Responses for Hassler Heating & Air Conditioning, LLC
Q: What are some of the most popular brands that Diamond Certified home energy auditors use when working with San Lorenzo residents?
A: Diamond Certified home energy auditors use top-quality brands like Extech Instruments, AAB Smart Tools, Bacharach Institute for Rehabilitation, REED Instruments and Supco.
Q: What types of energy usage analyses do home energy auditors offer?
A: Home energy auditors offer a range of energy assessments, from basic walkthrough assessments to comprehensive home energy audits. Basic assessments typically include a visual inspection of the home, an analysis of energy bills and energy usage, and a walkthrough of possible energy-saving measures. Comprehensive home energy audits involve a more detailed inspection, including the use of specialized equipment to measure air leakage, insulation levels, and moisture. The audit may also include a blower door test, which helps determine how airtight the home is, and a combustion safety test to make sure appliances are operating safely.
Q: Can Diamond Certified home energy auditors work with FLIR Systems products and similar items so I can get indoor air quality assessments in San Lorenzo?
A: Yes, Diamond Certified home energy auditors in San Lorenzo can work with FLIR Systems products and similar items to provide indoor air quality assessments.
Q: What did people search for when they wanted to find the best quality home energy auditors in San Lorenzo?
A: Energy Conservation Recommendations
Home Inspections
Appliance Energy Consumptions
Appliance Energy Consumptions
Energy-Saving Upgrades

Related Searches in San Lorenzo, CA

Search Home Energy Auditor in Nearby Locations

Nearby Search Results

Diamond Certified Companies Serving San Lorenzo, CA

Browse Types of Diamond Certified Companies Serving San Lorenzo, CA

The Homeowner's Guide to Home Energy Efficiency
Boiling Point: Modern Innovations in Water Heater Technology in San Lorenzo, CA
Boiling Point: Modern Innovations in Water Heater Technology
Posted by Matthew Solis

Find out about home water heaters and recent innovations for saving energy, more efficient water heaters, tankless water heaters, and more.

New and Higher Tax Credits for Energy Efficient Windows in San Lorenzo, CA
New and Higher Tax Credits for Energy Efficient Windows
Posted by Chris Bjorklund

Installing double-pane windows can quailfy you for federal tax credits. Learn more.

5 Overlooked Aspects of Home Energy Efficiency in San Lorenzo, CA
5 Overlooked Aspects of Home Energy Efficiency
Posted by James Florence

To maximize your home’s energy efficiency, it’s important to address commonly overlooked details. Here are five places to start.

Radiant Barriers: Are They Worthwhile? in San Lorenzo, CA
Radiant Barriers: Are They Worthwhile?
Posted by Guest Blogger

What are radiant barriers? These attic heat barriers keep homes comfortable, increase home efficiency, and save money on heating and cooling. Learn how.

View the Full Diamond Certified Guide to Home Energy Efficiency