Trusted Home Energy Audit for Mountain View Homeowners
A Home Energy Audit in Mountain View typically costs between $350 and $850 for a comprehensive assessment, with blower-door testing, thermal imaging, and a written report included. Most audits are scheduled within 2-3 business days, and same-day availability exists for homeowners facing urgent comfort or utility-spike concerns. Call (669) 259-0406 to book a slot or request a free estimate.
We’ve completed energy audits in over 9,000 homes since 2016, and the pattern in Mountain View is consistent: homeowners who bought between 2015 and 2025 are often dealing with building envelopes that were code-compliant when built but perform poorly against today’s energy costs and climate expectations. The older Eichlers and ranch-style homes in neighborhoods like Cuesta Park and Blossom Valley have specific leakage paths - unsealed top plates, original can lights, and duct runs through vented attics - that don’t show up on a standard home inspection. Our audits find them. Every audit ends with a written scope, a flat price for any recommended work, and a documented photo record. Under Haven Standard Clause 1, no work starts without a written price.
What Our Home Energy Audit Service Includes
Blower Door Test
A blower-door test is a pressurization reading that shows, in one number, how much air your building envelope is losing. We depressurize your home with a calibrated fan mounted in an exterior doorway, then measure the airflow required to maintain a 50-pascal pressure difference - the CFM50 figure. In Mountain View, we regularly see pre-audit readings of 3,500-5,500 CFM50 in 1,500-square-foot homes built in the 1960s and 1970s, particularly in the Monta Loma and Rex Manor areas where original construction predates modern air-sealing codes. After our air-sealing work, those same homes typically test at 1,800-2,800 CFM50, and we publish both numbers on every applicable job so you can verify the change.
Thermal Imaging Inspection
Thermal imaging uses an infrared camera to visualize surface temperature differences that indicate missing insulation, air leakage, or moisture intrusion. We run the thermal scan during or immediately after the blower-door test, when the pressure difference makes leakage paths visible as cold streaks on warm surfaces. In Mountain View’s climate - mild winters, dry summers, but with persistent marine-layer cooling in spring and early summer - thermal bridging through uninsulated framing and bypasses around chimneys and plumbing stacks are common findings in homes near the bay. Our technician walks the scan with you in real time, explaining what the color gradients mean and marking locations for the written report.
Insulation Inspection
An insulation inspection assesses the type, depth, condition, and coverage of existing insulation in your attic, walls, and crawl space. We measure R-values where accessible, check for compression or moisture damage, and identify areas where insulation was installed over unsealed air leaks - a frequent issue in Mountain View attics where blown-in fiberglass was added without addressing top-plate gaps or can-light penetrations first. Envelope Insulation Co. will never blow insulation over an unsealed attic floor; if your existing insulation was installed that way, we’ll document the condition and include air sealing as a prerequisite in our written scope.
Duct Leakage Test
A duct leakage test pressurizes your HVAC duct system to measure how much conditioned air escapes before reaching your rooms. We seal the registers and use a calibrated fan to test total leakage and leakage to outside - the latter being the figure that directly wastes energy, since it dumps heated or cooled air into your attic or crawl space. In Mountain View, duct leakage to outside often runs 20-35% in homes with original galvanized or unsealed flex duct, especially in the older stock near downtown and along El Camino Real. The test takes about 45 minutes and produces a leakage percentage we can compare against California Title 24 standards.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service for Home Energy Audit
We’ve audited and upgraded insulation systems using Owens Corning products in hundreds of Peninsula and South Bay homes, including their AttiCat blown-in fiberglass and ProPink loosefill systems. We know the density specs and the common installation errors - overspray near eaves, gaps around baffles - and we document them in our photo records so homeowners understand what they’re looking at.
Our crews also work regularly with Johns Manville and Knauf materials, from JM’s Spider custom-fit fiberglass to Knauf’s EcoSeal water-based air barrier applied before batt or blown-in installation. Whether your home currently has Owens Corning, Johns Manville, Knauf, Rockwool, or any other make, we can assess its condition, test its performance, and specify the right replacement or supplement if needed. No proprietary lock-in, no brand exclusivity - just the material that matches your home’s specific envelope conditions and your written scope.
Signs You Need Home Energy Audit Right Now
- Your PG&E bill spiked 30% or more year-over-year without a rate change. In Mountain View, where baseline rates are already among the highest in the state, a sudden jump usually means your heating or cooling system is working harder to compensate for envelope losses. The audit pinpoints whether the culprit is duct leakage, attic bypasses, or underperforming insulation.
- One room is consistently 8-12 degrees different from the rest of the house. This isn’t a thermostat problem. It’s almost always a duct-design or envelope issue - a disconnected duct run, a missing insulation patch, or a thermal bypass letting attic air stream into a wall cavity. Our thermal imaging finds the exact location.
- You smell attic or crawl-space air inside the home when the HVAC runs. That odor is a diagnostic: your duct system is leaking on the return side, pulling unconditioned air from the envelope into your living space. It’s also a moisture and indoor-air-quality risk in Mountain View’s variable humidity conditions.
- Your home was built before 1990 and has never had an energy audit. Pre-1990 construction in Mountain View, including most of the Eichler and ranch stock in Slater, Waverly Park, and The Crossings, predates modern air-sealing requirements. Even with upgraded insulation, these homes typically leak at 2-3 times the rate of current code.
- You’re planning a major remodel or HVAC replacement. The worst time to discover envelope problems is after the new system is installed. An audit before design gives your architect or HVAC contractor hard numbers - CFM50, duct leakage percentage, insulation R-values - to size equipment correctly and avoid the common Mountain View problem of oversized, short-cycling systems.
Our Home Energy Audit Process - Step by Step
- 1
Schedule and confirm. Call (669) 259-0406 or request online. A live person answers 24/7. We confirm your address in Mountain View, ask about your home’s age, size, and any specific comfort complaints, and send a text with your technician’s name and ETA the morning of the appointment. Under Haven Standard: Arrive on schedule, you get a named technician and a text when they are on the way.
- 2
Walk-through and interview. The technician arrives in a marked vehicle, uniformed and background-checked. We walk the home with you, noting draft complaints, temperature differences, and any prior insulation or HVAC work. This takes 15-20 minutes and shapes what we prioritize during testing.
- 3
Diagnostic testing. We set up the blower door, run the thermal camera, inspect accessible insulation, and test duct leakage if ducts are accessible. The full diagnostic suite takes 2-3 hours for a typical 1,500-2,500 square foot home in Mountain View. You can follow along; we explain what we’re doing as we go.
- 4
Review findings and written scope. Same day, we sit down with you - or call, if you prefer - to review the blower-door number, thermal images, insulation measurements, and duct leakage percentage. If work is recommended, we provide a flat price, written scope, and written warranty before anyone lifts a tool. Haven Standard Clause 1, always.
- 5
Documentation delivered. You receive a Documented Photo Record of the audit, including thermal images, insulation condition shots, and the blower-door or duct-leakage readings. If you proceed with work, we publish before-and-after blower-door numbers on every applicable job. If you don’t, you keep the documentation - no charge for the estimate, no pressure.
How Much Does Home Energy Audit Cost in Mountain View?
A comprehensive home energy audit in Mountain View runs $350-$850 depending on home size, test complexity, and accessibility. Here’s how that breaks down for typical scenarios:
- Basic audit (blower door + thermal imaging + insulation inspection): $350-$550 for homes under 2,000 square feet with accessible attics and crawl spaces.
- Standard audit (basic suite + duct leakage testing): $500-$700 for homes with forced-air HVAC, including multi-zone systems common in Mountain View’s larger remodels and additions.
- Comprehensive audit (all tests + combustion safety + moisture assessment): $650-$850 for older homes, homes with gas appliances, or properties with known moisture concerns in crawl spaces or basements.
What moves the price: square footage is the biggest factor - larger homes require more thermal imaging time and more access points for the blower door. Duct accessibility matters too; if your duct runs are buried in a finished basement or behind drywall, we may need to discuss limited-scope testing or access points. Homes in the hills near our Home Energy Audit in Los Altos Hills or Portola Valley with complex rooflines and multiple attic spaces also take longer to assess comprehensively.
How to avoid overpaying: some utilities and state programs offer rebates that cover part or all of audit costs for qualifying homes, but the work must be performed by a participating contractor using approved test protocols. We perform audits to program standards when requested, and we’ll tell you upfront whether your home qualifies. We also offer a Free Second Opinion on any written estimate - bring us a competing auditor’s report and we’ll review it with you, line by line, at no charge.
What’s included in our free estimate: a phone or in-person consultation to scope the audit, a flat price for the testing suite, and a clear explanation of what documentation you’ll receive. No hidden fees, no upsell to “premium” reporting. The written price is the price.
Home Energy Audit Near Mountain View - Our Service Area
We audit homes throughout Mountain View and the surrounding Peninsula and South Bay communities. Typical response times are same-day or next-day for Mountain View proper, including neighborhoods from Shoreline West to Jackson Park to the San Antonio area. For nearby cities, we usually schedule within 2-3 business days: Home Energy Audit in Los Altos, Home Energy Audit in Sunnyvale, plus Palo Alto, Los Altos Hills, East Palo Alto, Cupertino, Santa Clara, Menlo Park, Newark, Atherton, and Portola Valley. If you’re unsure whether your address falls in our route, call (669) 259-0406 and we’ll confirm.
Serving Mountain View, CA - Our Local Coverage Area
We’re based in the Mountain View area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Home Energy Audit in Mountain View
A home energy audit is a systematic diagnostic assessment of how your building envelope and mechanical systems use and lose energy. It combines pressurization testing, thermal imaging, insulation measurement, and duct leakage testing to produce a prioritized list of improvements with expected cost and savings. After our audit, you receive a written report with blower-door numbers, thermal images, and a flat-price scope for any recommended work.
A typical comprehensive audit takes 2.5 to 4 hours on site, depending on home size and test complexity. Smaller homes under 1,500 square feet with accessible attics may finish in 2 hours; larger homes with multiple HVAC zones or finished basements can take 4 hours or more. You’ll receive preliminary findings same day; the full documented report follows within 24 hours.
Most Home Energy Audit - Sunnyvale area audits run $350-$850, with the majority of single-family homes falling in the $450-$650 range for standard testing. The price depends on square footage, duct accessibility, and whether combustion safety or moisture testing is added. Call (669) 259-0406 for a flat, written estimate - no charge for the consultation, and estimates are always free.
Yes. We’ve audited, removed, and upgraded hundreds of Owens Corning systems in Mountain View and the surrounding area, including AttiCat blown-in and ProPink loosefill installations. We document existing OC installations in our photo records and can specify matching or upgraded materials if replacement is needed. Whether you have Owens Corning, Johns Manville, Knauf, or another brand, we assess and service it.
We offer same-day and next-day scheduling for urgent situations - sudden utility spikes, post-remodel comfort failures, or real estate transaction deadlines. A live person answers calls 24/7, and we’ll tell you honestly whether same-day is possible based on current route load. For non-urgent audits, we typically book within 2-3 business days.
The audit itself is a diagnostic service, so warranty applies to any follow-up work we perform. All completed work carries our 365-Day Done Right Promise - if it’s not done right, we make it right. The promise is backed by a written scope and written warranty delivered before anyone starts, per Haven Standard. If we recommend work and you choose to proceed, that documentation protects you for a full year.
Close all windows and exterior doors at least 4 hours before the audit; avoid running fireplaces or wood stoves for 24 hours prior; and gather 12 months of utility bills if you want us to correlate usage patterns with our findings. You don’t need to clear attic access - our technicians handle that - but do let us know about any known hazards like asbestos or active rodent issues. The technician will review safety protocols before starting.
Schedule Your Home Energy Audit Service in Mountain View Today
Call (669) 259-0406 to schedule your audit or request a free, written estimate with no obligation. A live person answers 24/7, and we’ll confirm your technician’s name and arrival window by text. Every audit ends with documented evidence - blower-door numbers, thermal images, and a flat price for any recommended work - so you know exactly what you’re dealing with before deciding on next steps. Under Haven Standard, your written price comes before any work starts, always.
Written by Wes Okafor, Owner at Envelope Insulation Co., serving Mountain View since 2016.