Directory / Portsmouth / Building
River Birch Builders
7 permits across 1 town in the last 6 months
Building · HVAC
Business contact from Portsmouth OpenGov record (signed-in), checked Nov 13, 2026. Not from permit records.
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 7
Types of projects
By place, trade and period
| Town / city | State | Trade | Last 90 days | Last 6 months | All documented |
|---|---|---|---|---|---|
| Portsmouth | NH | Building | 3 | 6 | 6 |
| Portsmouth | NH | HVAC | 0 | 1 | 1 |
Permit timeline
- Oct 26, 2026Finish existing basement approximately 1,000 square feet. Basement to include play room, flex room, living room, guest bPortsmouth · Building · Residential · 1 · #BLDG-26-806
- Oct 13, 2026Add a 2 story addition approximaltley 900 sqaure feet. Addition includes new family room, mudroom, powder room, and mastPortsmouth · Building · Residential · 1 · #BLDG-26-762
- Aug 17, 2026Renovate existing full bathroom. Install new flooring, new tile shower, repurpose claw foot tub and sink, provide new fiPortsmouth · Building · Residential · 1 · #BLDG-26-594
- Jul 28, 2026Build a 2 story addition on existing foundation and 1 story section of home. Renovate floor 1 with new mudroom, powder rPortsmouth · Building · Residential · 1 · #BLDG-26-532
- Jun 26, 2026Construct a 7'-10" x 12' two story addition over existing lower level walkout. This is a vertical expnasion with no incrPortsmouth · Building · Residential · 1 · #BLDG-26-446
- May 31, 2026Interior renovation. 1. Update Master Full Bath, Bonus Room 3/4 Bath, and Power Room 1/2 bath. Bathroom updates include Portsmouth · Building · Residential · 1 · #BLDG-26-347
- May 21, 2026Add Second floor over portions of existing dwelling. 1st floor renovations are contained under the new second floor addiPortsmouth · HVAC · Residential · 1 · #BLDG-26-320
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
- Portsmouth OpenGov portal · retrieved Nov 13, 2026
Not verified: contact info, business address, insurance, reviews. Page built Nov 13, 2026.