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PW DiMasi Electric is an electrical contractor in Waltham, MA. The BBB lists building rewiring, commercial and residential electrical services, installations, repairs, updates, emergency electrical repairs and new wiring among its services, and grades it A+. Peter W DiMasi holds Massachusetts electrician license 15273, which the state registry shows as active. Google shows 5 stars from 96 ratings and HomeAdvisor 4.8 from 36 ratings. Reviewers call Peter the owner and name electricians including Anthony, Ernest and Louis. A January 2026 review says he called back within the hour and sent a two-man crew the very next day; when the invoice showed the crew had only changed the bulbs in two unreliable ceiling fixtures, Mr. DiMasi came back with the same crew, inspected the wiring, and the customer never received a bill for that second visit. A December 2025 review describes a new garage outlet and a Nest power adapter installed, plus help prioritizing the items in a home inspection report. An April 2025 review describes knob and tube remediation, a service upgrade to 400A on a two-family home and an electric car charger, and a June 2025 review describes an upgrade to 200 Amps with duration and cost in line with the estimate. Other reviews describe a burned outlet replaced the next day during Thanksgiving season in November 2025, a panel upgrade, recessed lighting and bathroom exhaust fans. In r/waltham threads from 2023 and 2025, residents recommended PW DiMasi from their own use, one calling him communicative. A July 2018 Angi review says the crew finished only a portion of the job, kept putting the customer off and never finished the work.
“We use PW Dimasi and have had good experiences in general.”
“I have had much excellent work done by PW Dimasi, but I have had this happen as well.”
“We also use PW DiMasi and have since we moved in to this house several years ago. I've found him to be communicative and he seems to do good work.”
“I’ve used PW Dimasi and wouldn’t hesitate to recommend them.”
“We've had great experiences with PW DiMasi”
If I could give 6 stars I would. Peter and his team went above and beyond. They are very professional and cleaned up well after themselves. Highly recommend them to anyone in need of electrical work!
The owner is communicative & responsive and his team was on time, friendly, and efficient.
P.W. DiMasi Electric has been outstanding on multiple projects, including new installations and repairs. Peter and his team are highly professional, reliable, and do exceptional work. Communication is clear, expectations are met, and the results are consistently excellent. I highly recommend them and look forward to working with P.W. DiMasi Electric on future projects!
Our old house (1937) has been accumulating electrical problems for a few years. We called and left messages for three electricians who had better reviews than most. One of those was P. W. DiMasi. He called back within the hour. He was the only one to call back! He sent a two-man crew the very next day. They asked us for a thorough run-down of the problems we were having. They got right to work and were very efficient. Among the problems they solved were two ceiling fixtures that were unreliable (sometimes going on, sometimes not). We were afraid to use them because, hey, it’s electricity, and that can be dangerous. So we asked them to look at those fixtures. When I got the invoice, it stated that they had changed the two bulbs in those fixtures. I called back and explained that we wanted the wiring inspected. To be fair, I had only used the vague phrase “look at those fixtures.” Mr. DiMasi accompanied the same crew back to our home the morning after I called him. They inspected the wiring of the two fixtures. They found and rectified a significant problem in one of them. We never received a bill for that second visit! They spent a solid hour on the second visit, but Mr. DiMasi felt that responding to our concerns was just part of doing the original job responsibly. He is clearly committed to doing excellent work, and standing behind it. TLDR: The P. W. DiMasi Company is extremely efficient, thorough, and responsible.
Great company to work with. Very responsive and professional. Highly recommend.
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1 change recorded — last scanned Sep 19, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from PW DiMasi Electric. Use it to sanity-check bids, then get the real number in writing.
Standard receptacle swaps — a new dedicated circuit is a bigger job ($350–$750).
Flush mounts, pendants, chandeliers — hung on existing boxes.
Estimated range
$530 – $1,100
Typical electrical project around $820
Christmas Day power-mast repair4.4
State-verified electrician licenseNot yet rated
Same-day fix in half an hour2.9
Outdoor project wiring3.5
