Directory / Portsmouth / HVAC
William Martin
109 permits across 2 towns in the last 6 months
HVAC · Electrical · Gas fitting · Plumbing
We haven’t confirmed public business contact details for this contractor yet. You can still request a quote and we’ll pass it along once we reach them.
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.
New Hampshire 109
Types of projects
By place, trade and period
| Town / city | State | Trade | Last 90 days | Last 6 months | All documented |
|---|---|---|---|---|---|
| Portsmouth | NH | HVAC | 9 | 29 | 29 |
| Portsmouth | NH | Electrical | 7 | 29 | 29 |
| Merrimack | NH | Gas fitting | 9 | 16 | 16 |
| Merrimack | NH | HVAC | 1 | 13 | 13 |
| Portsmouth | NH | Plumbing | 6 | 12 | 12 |
| Merrimack | NH | Plumbing | 5 | 7 | 7 |
| Merrimack | NH | Electrical | 1 | 2 | 2 |
| Portsmouth | NH | Gas fitting | 0 | 1 | 1 |
Permit timeline
- Nov 10, 2026Direct Replace Electric water heaterPortsmouth · Plumbing · Plumbing · 1 · #PLMB-26-422
- Oct 30, 2026Replace 40 gallon electric water heaterMerrimack · Plumbing · Plumbing · 1 · #PP-26-258
- Oct 30, 2026Replace 40 gallon atmospheric vent water heaterPortsmouth · HVAC · Sheet metal · 1 · #MECH-26-596
- Oct 30, 2026Electrical Permit: ResidentialPortsmouth · Electrical · Electrical · 1 · #ER-26-458
- Oct 30, 2026Installing new 321 sq foot* Burnham STMX125 gas Steam Boiler . Chimney is lined and 7"Portsmouth · HVAC · Sheet metal · 1 · #MECH-26-595
- Oct 27, 2026Replace LP gas furnaceMerrimack · Gas fitting · Gas · 1 · #GP-26-216
- Oct 27, 2026Replace LP gas boilerMerrimack · Gas fitting · Gas · 1 · #GP-26-215
- Oct 23, 2026Replace 50 gallon electric water heaterMerrimack · Plumbing · Plumbing · 1 · #PP-26-248
- Oct 23, 2026Replace 40 gallon electric water heaterMerrimack · Plumbing · Plumbing · 1 · #PP-26-247
- Oct 22, 2026Replace gas boilerMerrimack · Gas fitting · Gas · 1 · #GP-26-208
- Oct 22, 2026Replace LP Combi boilerMerrimack · Gas fitting · Gas · 1 · #GP-26-207
- Oct 22, 2026Electrical Permit: ResidentialPortsmouth · Electrical · Electrical · 1 · #ER-26-440
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 New Hampshire Office of Professional Licensure and Certification (OPLC) license lookup.
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Sources
- Merrimack OpenGov portal · retrieved Nov 13, 2026
- Portsmouth OpenGov portal · retrieved Nov 13, 2026
Not verified: contact info, business address, insurance, reviews. Page built Nov 13, 2026.