Lebanon Zoning & Land Use Guide
What we have on file vs. what to verify locally
We don't have editor-verified zoning prose for Lebanonyet. Here's the structured data we do have, and the highest-leverage steps to confirm specifics for your parcel.
What we have on file
- Population:
- 14,179
- County:
- Grafton County
- State building code:
- NH State Building Code (based on 2018 IBC)(statewide default)
- State ADU law:
- Yes — New Hampshire RSA 674:71-73 (enacted by SB 146, signed March 2016) requires municipalities that adopt zoning to allow at least one accessory dwelling unit as a matter of right or by conditional use permit/special exception in all zoning districts that permit single-family dwellings. HB 1291 (2024), which would have expanded this to two ADUs by right, passed the House but was killed in the Senate.
- FEMA flood map:
- Search flood zones
- Planning department:
- City of Lebanon Planning Department
- Municipal code:
- View code online
Verify these locally
- Call the City of Lebanon Planning Department: (603) 448-3054
- Search the municipal code for the chapter that covers your zoning district and proposed use.
- Check FEMA flood zone for your parcel — flood-zone status changes setbacks, foundation requirements, and insurance.
- Check your HOA CC&Rs and recorded deed restrictions — they are common in Lebanon and frequently restrict ADUs, fences, and exterior changes beyond what zoning allows.
Key Zoning Facts
Lebanon Zoning Overview
Lebanon is a city of approximately 14,200 residents in Grafton County, New Hampshire, in the heart of the Upper Valley region along the Connecticut River. The city is a regional center for healthcare — Dartmouth-Hitchcock Medical Center (DHMC), one of New England's largest academic medical centers, is located within Lebanon — and is closely connected to Dartmouth College in nearby Hanover. These institutions drive considerable development activity and housing demand in the area. Land use is regulated by the city's zoning ordinance, codified in the Lebanon Municipal Code, and administered by the Planning Department.
New Hampshire's RSA 674:71 (enacted 2017) requires Lebanon, like all NH municipalities, to permit accessory dwelling units (ADUs) in any zone where single-family housing is allowed. At least one ADU per single-family lot must be permitted by right or conditional use permit. This state mandate is particularly significant in Lebanon given the region's tight housing market, and ADUs provide a meaningful housing option for healthcare workers, students, and others. The New Hampshire State Building Code (based on 2018 IBC/IRC) governs all permitted construction.
Key Zoning Districts
Lebanon's zoning establishes residential districts at varying densities: R-1 for lower-density suburban neighborhoods, R-2 for typical residential lots, and R-3 for multi-family housing. The Central Business District (CBD) governs Lebanon's downtown with minimal setbacks. General Commercial (GC) zones line Route 12A and the Interstate 89 Exit 18 interchange area, and a Light Industrial (LI) district encompasses the Lebanon Municipal Airport area and business parks.
| District | Type | Min Lot Size | Front Setback | Side Setback | Rear Setback | Max Height |
|---|---|---|---|---|---|---|
| R-1 | Single-Family | 20,000 sq ft | 30 ft | 15 ft | 30 ft | 35 ft |
| R-2 | General Residential | 10,000 sq ft | 25 ft | 10 ft | 25 ft | 35 ft |
| R-3 | Multi-Family | 6,000 sq ft/unit | 20 ft | 10 ft | 20 ft | 40 ft |
| CBD | Central Business | Varies | 0 ft | 0 ft | Varies | 50 ft |
ADU Rules
New Hampshire RSA 674:71 requires Lebanon to permit at least one ADU per single-family lot in any zone allowing single-family housing. ADUs may be attached, detached, or internal (e.g., a basement or above-garage unit). Local regulations may address setbacks, parking, size limits, and design compatibility, but the state prohibits outright bans on ADUs in single-family zones. Given Lebanon's housing demand from DHMC and regional institutions, ADUs can be an effective way to add housing stock. Contact the Planning Department at (603) 448-3054 for current ADU standards.
Development Process
Development in Lebanon requires permits through the Planning Department. The typical process includes:
- Zoning Verification — Confirm your proposed use is permitted in the applicable zoning district by consulting the municipal code or contacting Planning
- Site Plan / Subdivision Review — Larger projects and multi-family or commercial developments require Planning Board review
- Building Permit — Apply for a building permit with documents complying with the NH State Building Code
- Inspections — Schedule required inspections during construction
- Certificate of Occupancy — Obtain final approval before occupancy
Nonconforming proposals may require a variance or special exception from the Zoning Board of Adjustment.
Key Considerations
Before starting any development project in Lebanon, property owners should:
- Verify zoning classification by contacting Planning at (603) 448-3054
- Review the municipal code for district-specific dimensional standards
- Understand that NH RSA 674:71 guarantees ADU rights in single-family zones
- Determine flood zone status using FEMA's Flood Map Service Center — Lebanon has areas near the Connecticut River and Mascoma River with flood risk
- Check for HOA or condo association restrictions on your property, particularly in newer developments near DHMC
Disclaimer: This guide provides general information about zoning in Lebanon and should not be relied upon as legal advice. Zoning codes are subject to change. Always verify current regulations with the Lebanon Planning Department or the municipal code before making development decisions.
Regulatory Layers That Apply in Lebanon
Your property is subject to ALL of these regulatory layers. Each one can impose additional requirements beyond the others.
Federal
- FEMA Flood Zones: Applicable
- View FEMA Flood Map
State — New Hampshire
- Building Code: New Hampshire State Building Code (2018 IBC/IRC with NH amendments)
- State ADU Override: Yes (RSA 674:71 (2017))
County — Grafton County
- Role: Lebanon is located in Grafton County. The Upper Valley Lake Sunapee Regional Planning Commission serves the broader region. Grafton County does not directly administer city zoning.
City / Municipal
The city's zoning ordinance, building codes, and local permits form the primary layer of land-use regulation for your property.
Overlay Districts
No overlay districts identified.
Private Restrictions
- HOA / CC&Rs common: Yes
- Check HOA CC&Rs for additional requirements. Some newer Lebanon-area residential developments and condominium communities have HOA restrictions.
Statewide Context (New Hampshire)
Local data for Lebanon is limited. The following state-level facts apply across New Hampshire and are inherited by this page until city-specific details are verified.
- State Building Code
- NH State Building Code (based on 2018 IBC)
- State ADU Preemption
- Yes — state law overrides local rules
- Coastal Zone
- Yes
- Wildfire Zones
- No
ADU Rules in Lebanon
Permit Costs & Timelines
Permit Costs & Timelines
Specific permit fee schedules for Lebanon are available from the local planning department. Fees vary based on project type, scope, and valuation.
Check Lebanon permit fees →Official Sources
City-specific