David Therrien
1 permit across 1 town in the last 6 months
HVAC · Building
Active in Waltham in the last 90 days
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Activity by month
Permits filed each month. The first and last months are partial.
Where they’re working
Permits filed under this contractor by state and town, last 6 months.
Massachusetts 1
Types of projects
Location and projects
Documented permits by town. Pins sit at each town’s center, not at job addresses.
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By place, trade and period
Recent permits
Permit timeline: the most recent permits filed under this contractor in the last 6 months, newest first. Job values are shown only when the town record lists one.
- Sep 25, 2026Mechanical Job value $31,500Waltham · HVAC · Sheet metal · Issued · #P202740448
Older permit history
Filed more than 6 months ago. Shown for history; excluded from 6-month counts and rankings.
- Mar 2, 2026Commercial Alterations (older)Waltham · Building · Residential · Issued · #P202641285
Permit counts reflect permits filed in public town records naming this contractor as applicant. A permit shows permitted activity, not necessarily completed work, quality of work, or a final inspection.
License
We haven’t verified a state license for this name yet. We only show license details when we can match the record to this contractor with confidence. You can check directly at the Massachusetts license lookup.
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Sources
- Waltham Building Department permit listings (DocumentCenter PDF) · retrieved Nov 9, 2026
Not verified: contact info, business address, insurance, reviews. Page built Nov 15, 2026.