Do I need a permit in Concord, NH?
Concord enforces the 2015 International Building Code with New Hampshire amendments. The Building Department reviews all major structural work, electrical, plumbing, and HVAC before you start, and again at key inspection points. The 48-inch frost depth — deeper than the national standard — changes how you build decks, sheds, and foundations. Most residential projects that alter the structure, add square footage, or tap into utilities need a permit. Kitchen remodels, room additions, deck construction, electrical panel upgrades, and water-heater replacements are the projects Concord sees most often. Owner-builders can pull permits for owner-occupied residential work, but electrical and plumbing work typically must be done by licensed contractors — Concord requires proof of licensure before inspections. The Building Department is part of City Hall and handles all permit intake, plan review, and inspection scheduling. Processing times depend on project scope: a straightforward deck permit (no variance) might clear in 2-3 weeks; an addition with complex drainage or site-plan issues could take 6-8 weeks.
What's specific to Concord permits
Frost depth is the first thing to get right. Concord's 48-inch frost line — a product of the glacial geology and brutal winters — means deck footings, shed foundations, and fence posts must extend below 48 inches to avoid heave. The IRC standard is 36 inches; Concord's depth is 12 inches deeper. If you're building a deck or permanent structure, plan for deeper holes and longer footings. That also means spring footing inspections are critical — frost heave can crack foundations if the inspection is skipped.
Electrical work requires a licensed contractor in most cases. Homeowners can do non-structural work (painting, drywall, finish carpentry), but anything touching the panel, running new circuits, or installing hardwired appliances needs a licensed electrician. Concord Building Department will ask for proof of licensure before scheduling the rough electrical inspection. The exception: owner-occupied properties can sometimes do low-risk work under specific conditions — ask the Building Department directly, but plan to hire a licensed electrician to be safe.
The Building Department does not currently offer a fully online permit portal. You can search for application forms and fee schedules on the City of Concord website, but intake is largely in-person or by mail. The department accepts applications at City Hall during business hours (typically Monday-Friday, 8 AM to 5 PM; verify hours before you visit). Plan check timelines are fair, but the in-person intake means some back-and-forth if initial drawings are incomplete. Bring complete plans, site photographs, and a filled-out application to speed the process.
Setback and zoning rules are strict in Concord's neighborhoods. Many of Concord's residential areas have 25-foot or 30-foot front setbacks, 10-foot side setbacks, and 20-foot rear setbacks. Decks, sheds, and additions must respect these lines. If your project encroaches, you'll need a variance from the Zoning Board of Adjustment — a separate process that adds 4-6 weeks and often triggers a public hearing. Check the zoning map and measure your property lines before you design.
Inspections are sequential and thorough. Foundation/footing inspection happens before concrete is poured or backfilled. Framing inspection happens after rough framing but before drywall and insulation. Electrical, plumbing, and HVAC rough-in inspections follow. Final inspection happens when everything is complete. If you fail an inspection, you'll be asked to correct the issue and schedule a reinspection — this adds time, so getting it right the first time saves money. The Building Department is responsive to questions during the process; call early if you're unsure about a detail.
Most common Concord permit projects
These are the projects that Concord homeowners file for most often. Each has its own quirks — deck footings hit the frost line, kitchen remodels trigger electrical upgrades, additions involve setback checks. Click through to the detailed guides for each project type.
Decks
Any attached or freestanding deck over 30 inches high requires a permit. Concord's 48-inch frost depth means footings must go deep — plan for inspection before backfill. Detached decks under 200 square feet and under 30 inches high are exempt if they're not over water or in a setback area.
Additions and room expansions
Room additions, bump-outs, and garage expansions always need a permit. Setback compliance is the main barrier — Concord's 25-30 foot front setbacks and 10-foot side setbacks mean you often can't build as close to property lines as you'd like. Site plan, floor plans, and elevation drawings required.
Kitchen and bathroom remodels
Full kitchen remodels with new cabinetry, counters, and appliances are usually permit-exempt if electrical and plumbing remain in place. Moving utilities, upgrading circuits for new appliances, or relocating fixtures triggers a permit. Plumbing and electrical work must be done by licensed contractors.
Electrical upgrades and panel replacements
Panel upgrades, subpanel installations, new circuits, and hardwired appliance hookups all require a permit and a licensed electrician. Plan review is quick (1-2 weeks). Inspection happens at rough-in and final stages.
Shed and outbuilding construction
Sheds over 200 square feet, any shed with electrical or plumbing, and structures in setback areas need a permit. Small storage sheds (under 120 square feet, no utilities) may be exempt — check with the Building Department. Footings must respect the 48-inch frost depth.
Finished basement and interior renovation
Basement finishing (drywall, flooring, paint) is usually exempt. Adding egress windows, a second bathroom, or a bedroom requires a permit — especially the window, which must meet IRC R310.1 minimum size and sill-height rules. Plumbing for a new bathroom needs a licensed plumber.
Concord Building Department contact
City of Concord Building Department
City Hall, 41 Green Street, Concord, NH 03301
(603) 225-8500 ext. [building permit division] — call the main number and ask to be transferred to Building Permits or Building Inspection
Monday-Friday, 8:00 AM - 5:00 PM (verify hours before visiting)
Online permit portal →
New Hampshire context for Concord permits
New Hampshire adopts the International Building Code with state amendments but gives significant deference to local zoning and building officials. Concord follows the 2015 IBC. The state does not require licensing for all trades — owner-builders can pull permits for owner-occupied work — but Concord requires electrical and plumbing contractors to be licensed. New Hampshire's freeze-thaw cycle is brutal; the 48-inch frost depth in Concord is not arbitrary. Winter temperatures regularly drop to -10°F or lower, and spring thaw causes significant frost heave. Footings that don't extend below the frost line will shift and crack. The state also enforces the National Electrical Code (NEC) and the International Plumbing Code with New Hampshire amendments. If you're relocating within New Hampshire (e.g., from Nashua or Manchester), expect similar frost-depth rules and code editions, but setback and zoning rules vary by town. Concord's zoning is relatively strict for a state capital; more rural towns nearby have looser requirements.
Common questions
Do I need a permit for a small deck in Concord?
Yes, if it's attached to your house or over 30 inches high. Detached ground-level decks (under 30 inches high) under 200 square feet may be exempt, but Concord's definition is strict — any deck with stairs, over water, or in a setback requires a permit. A 10x12 attached deck (120 square feet, 36 inches high) always needs one. Call the Building Department to confirm your specific footprint and height.
What's the frost depth in Concord, and why does it matter?
Concord's frost line is 48 inches below grade. Any permanent structure (deck, shed, fence post, foundation) must have footings that extend below 48 inches to avoid frost heave — the upward movement caused by frozen soil in winter. If footings are shallower, they'll shift in spring, cracking the structure. Footing inspection must happen before backfill; the inspector will verify depth and alignment.
Can I do my own electrical work in Concord?
Homeowners can do non-electrical work (framing, drywall, painting). Electrical work — panel upgrades, new circuits, hardwired appliances — must be done by a licensed electrician in Concord. Before scheduling the electrical inspection, the Building Department will ask for proof of the contractor's license. Owner-occupied properties have some limited exceptions, but the safest path is to hire a licensed electrician.
How long does a typical permit take in Concord?
Simple projects (straightforward deck, small shed) take 2-3 weeks from application to approval. More complex projects (additions, setback variances, sites with drainage issues) can take 6-8 weeks. Plan review is the biggest variable. The Building Department doesn't offer online intake, so initial back-and-forth for incomplete applications can add time. Bring complete, clear plans to your first visit.
Do I need a variance if my deck is close to the property line?
Yes, if it encroaches on your setback. Concord's typical side setback is 10 feet; rear is 20 feet; front is 25-30 feet (varies by zone). If your deck is closer, you need a variance from the Zoning Board of Adjustment. This is a separate process: application, public notice, planning board or zoning board hearing. It adds 4-6 weeks and often triggers neighbor notification. Check your zoning district and measure carefully before you design.
What happens if I build without a permit in Concord?
Code violations in Concord start with a notice to correct. If you ignore it, the Building Department can issue a stop-work order and pursue enforcement action. You may face fines, be required to remove unpermitted work, or hit problems when you sell (inspections will uncover it). Getting a retroactive permit is expensive and time-consuming. It's always cheaper and faster to pull the permit upfront.
Does Concord allow owner-builders?
Yes, for owner-occupied residential work. You can pull your own permit and do the building yourself, but electrical and plumbing work still must be done by licensed contractors in Concord. Non-structural work (framing, drywall, finish carpentry, painting) is fair game. You're responsible for code compliance and scheduling inspections.
Ready to pull a permit in Concord?
Start by calling the Concord Building Department or stopping by City Hall with a sketch of your project. The first conversation is free and will tell you exactly what you need. Have your address, property description, and a rough idea of scope ready. If you're building a structure, measure from the property line to confirm setback compliance. If you're digging footings, remember the 48-inch frost depth — it's non-negotiable. For detailed information about your specific project, click through to the project-type guide above.