Ignition interlock installers in New Hampshire
90 installer locations in 62 New Hampshire cities, 66 of them verified against both the provider and Google Maps. Brands installed in New Hampshire: Intoxalock, Smart Start, LifeSafer, RoadGuard Interlock. 35 shops list Saturday hours and 2 offer mobile installation.
- Confirmed: provider page and Google Maps agree
- Listed: one source
- Unconfirmed: only a closed Google listing
1 shops are not on the map yet because we do not have coordinates for them. They still appear in the city lists below.
What it costs in New Hampshire
Published starting prices
| Provider | Install | Monthly lease | Calibration | Removal | 6 month floor | 12 month floor |
|---|---|---|---|---|---|---|
| Intoxalock | $7.49 to $29.99 | $22.49 to $89.99 | Not published | Not published | from $142* | from $277* |
| LifeSafer | Not published | $90 | Not published | Not published | from $540* | from $1,080* |
These are the lowest figures each provider publishes, so the 6 and 12 month totals are a floor, not a quote. They add the install fee, the monthly lease, calibration visits and removal where published. An asterisk means a fee is not published and is not included. Per day rates are counted as 30 days a month.
- Intoxalock: provider published intoxalock.com/state-requirements/new-hampshire, October 27, 2026
- LifeSafer: provider published lifesafer.com/new-hampshire/ignition-interloc..., October 27, 2026
Reported totals usually run two to three times the published floor. Calibration visits, device protection, data fees and missed-appointment charges are rarely in the headline price.
What people report paying
Nobody has reported New Hampshire fees yet. If you have paid for an interlock here, the form below takes a minute.
Full cost breakdown for New Hampshire
Report your fees
Cities in New Hampshire (62)Show or hide
- Amherst (1)
- Barrington (1)
- Belmont (2)
- Berlin (5)
- Boscawen (1)
- Bow (2)
- Brentwood (1)
- Brookline (1)
- Campton (2)
- Center Barnstead (1)
- Center Conway (1)
- Charlestown (1)
- Chichester (1)
- Claremont (1)
- Colebrook (1)
- Concord (3)
- Conway (1)
- Derry (1)
- East Hampstead (1)
- Epping (1)
- Epsom (1)
- Franklin (1)
- Gilford (1)
- Goffstown (1)
- Gorham (1)
- Greenfield (1)
- Hampton (1)
- Henniker (1)
- Holderness (1)
- Hooksett (2)
- Hopkinton (1)
- Hudson (2)
- Keene (4)
- Kingston (1)
- Laconia (1)
- Langdon (1)
- Lincoln (1)
- Littleton (1)
- Loudon (1)
- Manchester (3)
- Merrimack (1)
- Milford (1)
- Milton Mills (1)
- Moultonborough (1)
- Nashua (4)
- New Boston (1)
- Newport (1)
- Ossipee (1)
- Pelham (1)
- Plaistow (4)
- Portsmouth (1)
- Raymond (1)
- Rochester (2)
- Rollinsford (1)
- Salem (5)
- Seabrook (1)
- Somersworth (2)
- Tamworth (1)
- Weare (1)
- West Lebanon (1)
- Whitefield (1)
- Windham (1)
Amherst, NH
1 installer. Brands: Intoxalock.
Barrington, NH
1 installer, 1 verified. Brands: Intoxalock.
Belmont, NH
2 installers, 2 verified. Brands: Intoxalock, RoadGuard Interlock.
Berlin, NH
5 installers, 1 verified. Brands: Intoxalock, Smart Start, LifeSafer.
Boscawen, NH
1 installer, 1 verified. Brands: Intoxalock.
Bow, NH
2 installers. Brands: Intoxalock.
Brentwood, NH
1 installer, 1 verified. Brands: Intoxalock, LifeSafer.
Brookline, NH
1 installer, 1 verified. Brands: Intoxalock.
Campton, NH
2 installers, 1 verified. Brands: Intoxalock, Smart Start, RoadGuard Interlock.
Center Barnstead, NH
1 installer. Brands: Intoxalock.
Center Conway, NH
1 installer, 1 verified. Brands: Intoxalock, Smart Start.
Charlestown, NH
1 installer, 1 verified. Brands: Intoxalock.
Chichester, NH
1 installer, 1 verified, 1 with mobile install. Brands: Intoxalock.
Claremont, NH
1 installer, 1 verified. Brands: Intoxalock.
Colebrook, NH
1 installer, 1 verified. Brands: Intoxalock.
Concord, NH
3 installers, 3 verified. Brands: Intoxalock, LifeSafer.
Conway, NH
1 installer, 1 verified. Brands: Intoxalock.
Derry, NH
1 installer, 1 verified. Brands: Intoxalock.
East Hampstead, NH
1 installer, 1 verified. Brands: Intoxalock.
Epping, NH
1 installer, 1 verified. Brands: Intoxalock.
Epsom, NH
1 installer, 1 verified. Brands: Intoxalock, Smart Start, RoadGuard Interlock.
Franklin, NH
1 installer. Brands: Intoxalock.
Gilford, NH
1 installer. Brands: Intoxalock.
Goffstown, NH
1 installer, 1 verified. Brands: Intoxalock.
Gorham, NH
1 installer, 1 verified. Brands: Intoxalock.
Greenfield, NH
1 installer, 1 verified. Brands: Intoxalock.
Hampton, NH
1 installer, 1 verified. Brands: Intoxalock.
Henniker, NH
1 installer, 1 verified. Brands: Intoxalock, RoadGuard Interlock.
Holderness, NH
1 installer, 1 verified. Brands: Intoxalock.
Hooksett, NH
2 installers, 1 verified. Brands: Intoxalock, Smart Start.
Hopkinton, NH
1 installer, 1 verified. Brands: Intoxalock.
Hudson, NH
2 installers, 2 verified. Brands: Intoxalock.
Keene, NH
4 installers, 2 verified. Brands: Intoxalock, Smart Start, RoadGuard Interlock.
Kingston, NH
1 installer, 1 verified. Brands: Intoxalock.
Laconia, NH
1 installer, 1 verified. Brands: Intoxalock.
Langdon, NH
1 installer, 1 verified. Brands: Intoxalock.
Lincoln, NH
1 installer, 1 verified. Brands: Intoxalock.
Littleton, NH
1 installer, 1 verified. Brands: Intoxalock.
Loudon, NH
1 installer, 1 verified. Brands: Intoxalock.
Manchester, NH
3 installers, 2 verified. Brands: Intoxalock, RoadGuard Interlock.
Merrimack, NH
1 installer, 1 verified. Brands: Intoxalock.
Milford, NH
1 installer, 1 verified. Brands: Intoxalock.
Milton Mills, NH
1 installer, 1 verified. Brands: Intoxalock.
Moultonborough, NH
1 installer, 1 verified. Brands: Intoxalock.
Nashua, NH
4 installers, 4 verified. Brands: Intoxalock, Smart Start, LifeSafer, RoadGuard Interlock.
New Boston, NH
1 installer, 1 verified. Brands: Intoxalock.
Newport, NH
1 installer. Brands: Intoxalock.
Ossipee, NH
1 installer, 1 verified. Brands: Intoxalock.
Pelham, NH
1 installer. Brands: Intoxalock, LifeSafer.
Plaistow, NH
4 installers, 2 verified. Brands: Intoxalock.
Portsmouth, NH
1 installer, 1 verified. Brands: Intoxalock.
Raymond, NH
1 installer, 1 verified. Brands: Intoxalock.
Rochester, NH
2 installers, 1 verified. Brands: Intoxalock.
Rollinsford, NH
1 installer. Brands: Intoxalock.
Salem, NH
5 installers, 4 verified, 1 with mobile install. Brands: Intoxalock, Smart Start, RoadGuard Interlock.
Seabrook, NH
1 installer, 1 verified. Brands: Intoxalock.
Somersworth, NH
2 installers, 1 verified. Brands: Intoxalock, Smart Start.
Tamworth, NH
1 installer, 1 verified. Brands: Intoxalock.
Weare, NH
1 installer. Brands: Intoxalock.
West Lebanon, NH
1 installer, 1 verified. Brands: Intoxalock.
Whitefield, NH
1 installer, 1 verified. Brands: Intoxalock.
Windham, NH
1 installer, 1 verified. Brands: Intoxalock.