Building Doctors reviews
• last updated FEB 26, 2026Loading map...
The Verdict
Building Doctors delivers solid energy-efficiency work, but the experience depends heavily on who you get. We found 24 reviewers who praised their workmanship, especially on complex whole-house retrofits involving insulation, ductwork, and HVAC replacements. One homeowner waited two years to write a review just to confirm the results held up: her house went from hitting 80 degrees on scorchers to retaining morning cool well into the afternoon. The energy audits stand out. Two technicians spent hours testing a 1932 bungalow, then delivered a 72-page report identifying hidden safety issues and explaining exactly why other contractors wanted to install an AC unit twice the necessary size. We also noticed a pattern of post-sale support that verges on the obsessive. One customer called seven years after a water heater install, got a text back at 7pm on a Friday, and had a technician walk her husband through a reset over the phone the next morning at no charge. But three reviews describe a very different company: contract terms changed the night before work began, jobs stretching over a year past deadline, and an owner who responds to complaints with vague legal threats.
If you value an installer who'll still answer the phone seven years later when your water heater acts up, Building Doctors delivers that rare loyalty. Just know the owner's abrasive style has burned some customers badly enough to wait until their warranty expired before posting a review.
Reviews That Shaped Our Verdict
Mel C. hired Building Doctors for a job more than a year ago and paid over $31,000 up front. The night before installers arrived, Dan rewrote nearly every term of the contract and then began insisting they pay whatever balance he alone decided. They trusted him — and ended up with an unfinished project after more than a year while still facing unilateral demands for additional payment.
5Genglish hired Dan to fit an outdoor water heater in December 2012, and years later discovered they had no hot water right after a heavy rain. They phoned Dan, who guessed the unit had taken on water, but they also called a plumber listed by the manufacturer; that plumber charged $125 to come out and, after opening the heater, declared it flooded and said it needed replacement. Not convinced, they texted Dan at 7:00 on a Friday night; by the next day a Building Doctors serviceman called, talked their husband through a reset over the phone, and the heater sprang back to life with no charge. What stood out was the quick, no-cost troubleshooting from Dan’s team that avoided a $2,000-plus replacement on an almost seven-year-old installation.
Jeff began his process by calling Dan, the owner, several times; Dan helped diagnose problems over the phone and then came by for a free walkthrough before suggesting a full home energy audit. On the morning of the audit, Scott and Mark arrived on time with a toolbox and testing gear, spent hours measuring and probing, and inspected the attic and crawlspace while taking careful precautions around the house. A few days later they emailed a 72-page audit that amazed him — dense with findings, including safety issues he hadn’t known about — and they spent an hour together as the team explained, from a building-science perspective, what each discovery meant. The very next day they delivered an estimate that was even more meticulous: every step listed as a line item with small photos for each scope so he could picture the proposed work. Compared with other contractors who wanted to oversize his furnace and air conditioning by roughly twice as much, their recommendations felt measured and evidence-based. He hasn’t yet chosen every upgrade, but he’ll be hiring them to do the work, and what stuck with him most was the combination of the exhaustive 72-page audit and the photo-illustrated,——
Platforms Monitored
Performance by Work Type
How We Got To Trust Score 80
Clean Record
Unauthorized Activities
Passed screening
Misleading Claims
Passed screening
Background Check
Serving customers for 16 years
Among the longest-standing installers in the market.
BBB Rating
Not BBB rated.
Natural Review Patterns
Reviews were posted naturally over time.
Contractor License
License information could not be confirmed.
What You Can Expect
Mel C. hired Building Doctors for a job more than a year ago and paid over $31,000 up front. The night before installers arrived, Dan rewrote nearly every term of the contract and then began insisting they pay whatever balance he alone decided. They trusted him — and ended up with an unfinished project after more than a year while still facing unilateral demands for additional payment.
5Genglish hired Dan to fit an outdoor water heater in December 2012, and years later discovered they had no hot water right after a heavy rain. They phoned Dan, who guessed the unit had taken on water, but they also called a plumber listed by the manufacturer; that plumber charged $125 to come out and, after opening the heater, declared it flooded and said it needed replacement. Not convinced, they texted Dan at 7:00 on a Friday night; by the next day a Building Doctors serviceman called, talked their husband through a reset over the phone, and the heater sprang back to life with no charge. What stood out was the quick, no-cost troubleshooting from Dan’s team that avoided a $2,000-plus replacement on an almost seven-year-old installation.
Jason hired Dan and his team about four years ago to make his house more energy efficient. When he reached out again during a roof replacement—because the roofer was also installing a new AC/heater and old permits needed locating—Dan immediately dug up and resent all the permits even though he knew he wouldn’t get the current job. He reviewed the new contractor’s heating load estimates, flagged that they were off, and backed up his advice by sending the original files from the work done four years earlier. Jason ended up with the permits and the four-year-old house files that corrected the HVAC estimates. The detail that sticks with him: Dan stayed incredibly helpful and practical, providing the exact documents and analysis needed despite having no prospect of new business.