Top-Rated Home Energy Auditors in Denver, CO
5 local auditors ranked by 32 Google reviews. Free to compare, no sign-up.
Short answer: The top-rated home energy auditors in Denver are e3 Power (4.8★, 21 reviews), bldg collective (5.0★, 4 reviews), Group14 Engineering PBC (5.0★, 2 reviews).
Home energy auditors in Denver, ranked
- 4.8 (21 Google reviews)181 E 56th Ave #600, Denver, CO 80216
- 5.0 (4 Google reviews)2872 Bluff St, Boulder, CO 80301
- 5.0 (2 Google reviews)1278 Lincoln St, Denver, CO 80203
- 5.0 (1 Google reviews)6275 Joyce Dr 2nd Floor, Arvada, CO 80403
- 3.3 (4 Google reviews)309 Mountain Ave, Berthoud, CO 80513
Every company here is on RESNET's 2026 list of HERS rating companies and has an office within 80 km of Denver. See every home energy auditor we list, rated or not. Check your utility's own assessment before you pay for an audit.
Together these 5 companies average 4.7★ across 32 reviews. e3 Power has the most reviews (21).
Ranked by Google rating weighted by review count, collected October 2026. Rankings are not paid for. How we rank and how we make money.
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- A rebate calculator for your website. Clients answer a few questions and see the rebates they can stack. Get the embed code.
- A one-page Denver rebate sheet to print or email to clients, with every open program, the main rule and the official source. Open the rebate sheet.
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What a home energy audit costs in Denver
Some utility programs pay for the assessment. Ask each auditor for the price of the audit and any test-out visit after the work, so you can compare.
Check whether each one needs an energy assessment or pre-approval before work starts. That could cut your cost by up to $2,000 if you qualify. Most rebates have rules (income, your current heating, a registered contractor, approval before work starts).
Rebates: our verified program data, checked monthly. Always confirm the exact amount for your home.
What a home energy audit covers in Denver
A home energy auditor visits your home and finds where it wastes energy. Most test how much air leaks out with a blower door, check insulation in the attic, walls and basement, and look at your heating, cooling and hot water. You get a report that lists upgrades in order of value.
If your program needs an audit, book it first. Some utility insulation and air sealing programs pay only after an assessment, and some need it before any work starts. Ask your utility whether an outside auditor's report counts, or whether you must book through the program.
Before you hire a home energy auditor
- Ask whether they are BPI certified or a RESNET HERS rater, and whether they run a blower door test.
- Ask whether your utility's insulation or heat pump program accepts their report, or whether you must book through the program.
- Ask what the audit costs, what the report includes, and whether a test-out visit after the work costs extra.
- Ask whether they also sell or install upgrades. An auditor who does not sell gives the most neutral advice.
Questions about home energy auditors in Denver
Who is the best home energy auditor in Denver?
Based on Google reviews, the top-rated home energy auditors in Denver are e3 Power (4.8★, 21 reviews), bldg collective (5.0★, 4 reviews), Group14 Engineering PBC (5.0★, 2 reviews). We rank by a review-weighted score, so companies with many strong reviews rank above those with only a few.
How are the home energy auditors in Denver ranked?
We list 5 home energy auditor companies in Denver, ranked by Google rating weighted by review count. Together they have 32 Google reviews and average 4.7 stars, collected October 2026. e3 Power has the most reviews (21). No company pays to be listed or ranked.
How much does a home energy audit cost in Denver?
Prices vary by auditor and by the size of your home. Some utility programs pay for the assessment. Ask each auditor for the price of the audit and any test-out visit after the work.
Are there rebates for home energy upgrades in Denver?
Yes. Our verified program data shows insulation rebates up to $500, heat pump rebates up to $1,500 open in Denver. Check whether each one needs an energy assessment before work starts. Most rebates have rules, such as income, your current heating, a registered contractor, or approval before work starts, so check the rebate page before you sign.
Do I need an energy audit before I upgrade in Denver?
If your program needs an audit, book it first. Some utility insulation and air sealing programs pay only after an assessment, and some need it before any work starts. Ask your utility whether an outside auditor's report counts, or whether you must book through the program.
What should I ask a home energy auditor before I hire?
Ask whether they are BPI certified or a RESNET HERS rater, and whether they run a blower door test. Ask whether your utility's insulation or heat pump program accepts their report, or whether you must book through the program. Ask what the audit costs, what the report includes, and whether a test-out visit after the work costs extra.
Before you call anyone, check what home energy auditor rebates you can get in Denver. Many programs require approval or a registered contractor before work starts.
Planning more upgrades? See the top-rated heat pump installers, solar installers, insulation installers, home battery installers in Denver.
See every rebate in Denver
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