Northeast
Tub to Shower Conversion in Grafton County, New Hampshire
Permit requirements, inspections and modeled costs for tub to shower conversion in unincorporated Grafton County. If your address falls inside a city, the municipal building department issues the permit instead.
Model reviewed August 2026
Do you need a permit for tub to shower conversion in Grafton County?
Usually yes
In most cases yes — Grafton County and the City of Unincorporated Grafton County generally require a permit for tub to shower conversion. Height, size and location on the lot determine the exact review, so confirm with the building department before you start.
Budget $3,900 – $17,900 for the work itself (typically $8,000) plus a modeled $85–$295 permit allowance. Dollar figures are modeled, not quoted.
Permit authority: Grafton County building departmentModeled estimate for unincorporated addresses.
Grafton County cost model
| Budget scope | $3,900 |
|---|---|
| Typical project | $8,000 |
| Premium / complex | $17,900 |
| per conversion | $3,900 – $17,850 |
| Permit feesModeled allowance | $85 – $295 |
| vs national baseline | +12% |
| Timeline | 3-7 days of work, 2-5 weeks including permitting |
Inspections typically required
Typical inspection sequence for this project type under the New Hampshire code basis. Grafton County and the cities inside it can add, combine or waive inspections — confirm the sequence with the permitting authority before scheduling.
- Plumbing rough-in
- Shower pan water test
- Final inspection
Documents usually requested at submittal
Common submittal items for this project type. The exact checklist is set by the authority that issues your permit and can differ inside the county.
- Plumbing permit application
- Contractor license and insurance
Cities inside the county that permit their own work
If the property is inside these municipalities, apply to the city rather than the county.
We track 1 municipalities in Grafton County: Haverhill. Contact the city directly if your address is inside one of them.
Statewide rules that apply here
Grafton County follows New Hampshire's statewide code basis (New Hampshire State Building Code, based on the IRC). Local amendments can add requirements but cannot reduce the statewide minimum.
Frequently asked questions
How long does tub to shower conversion take?
3-7 days of work, 2-5 weeks including permitting. Permit review and inspection scheduling are usually the largest source of variation.
What changes the price the most?
The largest cost drivers are drain relocation from tub to shower position; tile versus acrylic shower base and walls; glass enclosure type.
Sources
Sources & verification
Model vintage August 2026. The links above are the issuing agencies' own pages — we publish them so you can confirm the current rule yourself, not as evidence that each fact on this page was re-checked with them today. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing, not quotes. Permit rules change; confirm with the building department before starting work.