Concord, NH Zoning Regulations & Building Permits
Official references and local checks
Use the official references below to identify the rules that apply to your address, then confirm parcel-specific requirements with the local authority before filing an application.
Official references
- Population:
- 43,976
- County:
- Merrimack 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:
- Concord City Planning Division
- Municipal code:
- View code online
Before you apply
- Call the Concord City Planning Division: (603) 225-8515
- 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 Concord and frequently restrict ADUs, fences, and exterior changes beyond what zoning allows.
Key Zoning Facts
Concord is the state capital of New Hampshire, located in Merrimack County, with a population of approximately 43,976 (2020 Census). As a city, Concord operates under a city council and city manager form of government. Land use and development are regulated through the city's zoning ordinance, administered by the Concord City Planning Division.
Concord's zoning ordinance divides the city into multiple districts, including several residential zones ranging from single-family (RS) with 12,000 sq ft minimum lots to multi-family (RM) with 8,000 sq ft minimums. The city also includes Residential-Office (RO), Neighborhood Commercial (CN), General Commercial (CG), Downtown Commercial (CD), and Industrial (I) districts.
Key Zoning Districts
Concord's primary residential zoning districts include:
- RS (Single-Family Residential) — Minimum 12,000 sq ft lots with 30 ft front, 10 ft side, and 20 ft rear setbacks. Maximum height of 35 ft.
- RM (Multi-Family Residential) — Minimum 8,000 sq ft lots with 25 ft front, 10 ft side, and 20 ft rear setbacks. Maximum height of 45 ft.
- RO (Residential-Office) — Transitional district allowing residential and compatible office uses.
Commercial districts include:
- CN (Neighborhood Commercial) — Small-scale commercial serving nearby residential areas
- CG (General Commercial) — Broad range of retail, office, and service uses
- CD (Downtown Commercial) — Mixed-use district in Concord's downtown core
- I (Industrial) — Manufacturing, warehousing, and related industrial uses
ADU Regulations (Accessory Dwelling Units)
New Hampshire state law (RSA 674:72-73) requires all municipalities to allow ADUs (Accessory Dwelling Units) as a matter of right on any property with a single-family dwelling. Concord has adopted ADU provisions in compliance with this state mandate. Key points:
- One ADU is permitted per single-family lot
- The ADU may be attached to or detached from the primary dwelling (subject to local standards)
- Municipalities cannot prohibit ADUs but may adopt reasonable regulations regarding size, parking, and other dimensional standards
- Contact the Concord City Planning Division for the city's specific ADU application requirements and any local dimensional standards
Building Code
Concord follows the NH State Building Code (RSA 155-A), which is based on the International Building Code (IBC) and International Residential Code (IRC). All construction must comply with the state building code.
Development Process
Development in Concord generally requires obtaining the appropriate permits from the city's planning and building departments. The process typically involves:
- Zoning Verification — Confirm that your proposed use is permitted in the applicable zoning district
- Site Plan Review — For commercial, multi-family, and certain other projects, submit a site plan to the Planning Board
- Building Permit — Apply for a building permit with construction documents
- Inspections — Schedule required inspections during construction
- Certificate of Occupancy — Obtain final approval before occupying the structure
For projects that do not conform to existing zoning, property owners may need to seek a variance or special exception from the Concord Zoning Board of Adjustment (ZBA).
Key Considerations
Before starting any development project in Concord, property owners should:
- Verify the zoning classification of their property
- Review setback, height, and lot coverage requirements for the applicable district
- Check for any overlay districts or special regulations
- Determine if the property is in a flood zone using FEMA's flood map service
- Confirm whether HOA covenants or deed restrictions apply
- Review the Concord Code of Ordinances for the full zoning text
- Contact the Concord City Planning Division at (603) 225-8515 for pre-application guidance
Disclaimer: This guide provides general information about zoning in Concord, NH and should not be relied upon as legal advice. Zoning codes are subject to change. Always verify current regulations with the Concord City Planning Division or the municipal code before making development decisions.
Regulatory Layers That Apply in Concord
Your property is subject to ALL of these regulatory layers. Each one can impose additional requirements beyond the others.
Federal
- FEMA flood mapping: check parcel-specific flood-zone status
- View FEMA Flood Map
State — New Hampshire
- Building Code: NH State Building Code (RSA 155-A)
- State ADU Override: Yes (NH RSA 674:72-73 requires municipalities to allow ADUs)
County — Merrimack County
City / Municipal
The municipality's zoning ordinance, building-code enforcement, and local permits form the primary local layer of land-use regulation for your property.
Overlay Districts
No overlay districts identified.
Private Restrictions
- Private covenants, deed restrictions, condominium rules, or association rules can impose requirements beyond zoning.
- Check HOA CC&Rs and deed restrictions for additional requirements.
Statewide Context (New Hampshire)
Local data for Concord 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 Concord
State law (statewide context, not city-specific):
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.
For local size, setback, and parking specifics, contact the Concord City Planning Division.
Permit Costs & Timelines
Check Current Permit Fees & Timelines
Permit fees and review times can vary by project type, scope, valuation, and required approvals. Check the current schedule with the local permitting authority before filing.
Check current Concord permit information →Official Sources
City-specific