What happens if you skip the permit (and you needed one)
- Stop-work order from Concord Building Department can freeze your project mid-install; re-pulling the permit costs 1.5× the original fee ($375–$600 total) plus contractor mobilization charges averaging $500–$1,500.
- Insurance claim denial: if a heat pump malfunction (electrical fire, refrigerant leak, water damage from condensate backup) occurs on an unpermitted system, your homeowners or contractor's liability won't cover it — you eat the full cost, often $5,000–$20,000+.
- Resale disclosure hit: New Hampshire real-estate law (RSA 481:13-a) requires sellers to disclose known code violations; an unpermitted HVAC system becomes a title defect that kills buyer financing and drops property value by 2–5%, easily $20,000–$60,000 on a $400,000 home.
- Federal tax credit clawed back: IRS requires proof of permit (copy of paid permit + final inspection sign-off) to claim the 30% heat-pump tax credit; no permit = no credit = $600–$2,000 lost tax refund.
Concord heat pump permits — the key details
Concord adopts the 2015 International Energy Conservation Code (IECC) and 2015 International Residential Code (IRC), with New Hampshire state amendments. For heat pumps, IRC M1305 governs clearances from combustibles and service access, and the state's Residential Building Energy Standards require that any heat pump serving a New England zone 6A property must be paired with auxiliary or backup heating that can deliver 100% of design heating load if the heat pump alone cannot (this is why your Manual J load calc matters so much). The city's Building Department specifically requires ACCA Manual J output showing heating and cooling loads before issuing a permit for any new or converted system. If your installer is licensed and filing online, Concord's system allows them to upload the Manual J at the time of application, which can cut approval time from two weeks to 2–3 business days. That online pathway is Concord-specific — many smaller towns in NH still require paper and in-person submission, which adds a week.
One surprise rule that trips up homeowners: Concord's electrical inspector (who reviews the heat pump's circuit and panel upgrade as part of the electrical permit) will reject a plan if your main electrical service panel is undersized for the compressor plus air-handler/backup-element load. A typical 12,000–18,000 BTU cold-climate heat pump draws 30–50 amps during compressor operation, and if you're adding resistive strip heat for staging, that's another 30–40 amps on a separate breaker. If your home has 100-amp service (common in older Concord homes), you will need a service upgrade — often $3,000–$5,000 — before the heat pump can be installed. The Building Department issues an electrical pre-check (free) if you submit panel specs and heat pump nameplate data upfront; this lets you budget for the upgrade before breaking ground.
Gray areas: (1) If you are replacing a heat pump with an identical model (same tonnage, same location), some contractors claim it needs only a service call, not a permit. Concord's Building Department publishes an FAQ stating that like-for-like replacements by a licensed contractor may not require a new permit, but the department reserves the right to request a permit application if there's any doubt about tonnage or location — so always call ahead (see contact card) and confirm. (2) If you are installing a mini-split (ductless) heat pump, Concord treats it the same as a central system: if it's replacing an existing mini-split, no permit; if it's new or supplemental, full permit required. (3) Thermostat replacement alone is always exempt. (4) Emergency repairs to an existing heat pump (compressor motor swap, refrigerant top-up) are exempt provided the system is returned to its original capacity within 30 days; beyond that, a permit is required.
Concord's climate and soil context: zone 6A winter design temperature is around -15°F, and the 48-inch frost depth (standard for NH) means outdoor condensing-unit placement must have a pad or footer below frost line to prevent settling and refrigerant-line stress. The city's glacial/granite soil means trenching for any buried refrigerant or condensate line requires pre-dig utility locates (Call 811 in NH) — the Building Department will note this on your permit as a condition. Spring thaw and summer humidity are intense here, so condensate management is critical: line-of-sight routing to the exterior, or a condensate pump if the condenser is below grade, must be detailed on the mechanical plan. The inspector will verify this at rough mechanical. Water damage claims from improper condensate routing are one of the top reasons insurance denies coverage post-installation, so this is not a skip.
Practical next steps: (1) Hire a licensed HVAC contractor (required to pull permits in Concord). (2) Request that they run ACCA Manual J and submit it along with the heat pump nameplate data, outdoor unit cutsheet, and electrical load specs to Concord Building Department via the online portal. (3) Budget 2–3 weeks from permit application to final inspection if there are no electrical panel issues; add 4–6 weeks if a panel upgrade is needed (permitting the upgrade plus installation time). (4) Collect the paid permit receipt and final inspection sign-off — these are your proof documents for the federal tax credit and any utility rebates. (5) Ask your contractor about New Hampshire's ENERGY STAR Most Efficient rebate (sometimes $1,000–$2,500 from Eversource or National Grid); this usually requires a pre-approval from the utility before installation, and proof of permit to claim.
Three Concord heat pump installation scenarios
Cold-climate heat pump sizing and backup heat strategy in Concord zone 6A
Concord winter design temperature is -15°F, and zone 6A heating load is significant. This is why Concord's Building Department (following state energy code) mandates a Manual J load calculation before approving any new or converted heat pump. A Manual J is a room-by-room calculation of heating and cooling loads based on insulation, window area, air leakage, occupancy, and appliance heat gain. For a typical 2,000-sqft Concord colonial, heating load might be 35,000–50,000 BTU/h, and a single 3-ton heat pump (36,000 BTU/h cooling) can often deliver 30,000–35,000 BTU/h of heat at outdoor temperatures above 20°F. Below 20°F — which Concord sees 40–60 days per year — the heat pump's capacity drops, and backup heat (resistive strips in the air handler, or a retained gas furnace on a dual-fuel setup) kicks in. The permit application must show this strategy. If your contractor undersizes the heat pump and doesn't include adequate backup heat, the inspector will reject the plan, and you'll have wasted application time and fees. Conversely, oversizing the heat pump beyond the cooling load wastes capital and energy. A licensed contractor running Manual J upfront saves rework and ensures you get the federal tax credit without dispute.
New Hampshire's state energy code also requires that the heat pump AND its backup heating together be documented on the mechanical permit plan — not an afterthought. Resistive strip heat is the simplest: 5–15 kW of electric resistance in the air handler, staged so the compressor leads and strips engage only if outdoor temp drops below setpoint (e.g., 35°F outdoor) or if you run emergency heat. Gas-furnace backup (dual-fuel) is an alternative if you retain the furnace; this costs less to operate during deep-winter days but adds complexity and vents, so newer zero-net-energy approaches favor all-electric with oversized heat pump. Concord's inspector will ask on rough-mechanical walkthrough: 'Where is your backup heat, and at what outdoor temperature does it engage?' If you don't have a plan, the inspector issues a correction notice, and you lose a week (or more) getting it fixed.
One cost many homeowners miss: if your home is all-electric (no furnace, no back-up heater) and you're installing a heat pump for the first time, you might need a resistive heating circuit (e.g., 240-volt 15-kW element) added to the air handler or heat pump unit itself. This is a separate line item — typically $1,000–$2,000 — that doesn't show up in the 'heat pump cost' quote but must be included for the permit and inspection.
Concord's online permit portal and contractor pre-filing
Concord has invested in a city-managed online permit portal accessible via the City of Concord website (search 'Concord NH building permit' or 'Concord permit portal'). This is a significant advantage over towns that require in-person filing. A licensed HVAC contractor can upload mechanical and electrical permit applications 24/7, along with supporting docs: Manual J, equipment nameplate, electrical load calc, and site photos. The Building Department typically assigns a plan reviewer within 1–2 business days, and approval or corrections come back via email. For straightforward like-for-like replacements, turnaround is sometimes same-day or next-day. For conversions or new systems requiring deeper review, budget 5–7 business days. This is faster than towns requiring you to print, walk in, and wait in line — a savings of 1–2 weeks in many cases. However, the portal does NOT bypass the three inspections (rough mechanical, electrical, final); those still require a city inspector to visit the job site, so the total project timeline is still 2–4 weeks from permit application to final sign-off.
A Concord-specific caveat: the portal requires the contractor to register as a 'Concord Permitted Contractor' and provide NH HVAC license number, liability insurance, and surety bond info upfront. Not all contractors are registered; some do side jobs and avoid the portal. If you hire an unregistered contractor, they either can't file online (requiring you to hand-carry the application in) or they'll claim no permit is needed — another reason to confirm with the Building Department directly before contract signing. Licensed and registered contractors will quote you an extra $50–$100 to handle permit filing via the portal; this is normal and worth it.
The portal also allows you to track your permit status in real-time and see inspector notes. This transparency is rare in small New Hampshire towns and worth noting if you're comparing Concord's process to a neighboring municipality. You can also receive email reminders about upcoming inspections, which helps coordinate contractor and inspector schedules.
City Hall, 41 Green Street, Concord, NH 03301
Phone: (603) 225-8500 (main) — ask to be transferred to Building Department; or search 'Concord NH building inspector' for direct line | https://www.concordnh.gov (navigate to 'Permits' or 'Building Department'; online portal link is usually there)
Monday–Friday, 8:00 AM–5:00 PM (confirm by phone, as hours may vary seasonally)
Common questions
Do I need a permit for a heat pump replacement if I'm keeping the same outdoor unit location and tonnage?
It depends. Concord Building Department's FAQ states that like-for-like replacements by a licensed contractor may be exempt from permitting, but the department reserves the right to ask for a permit application if tonnage or location changes, or if they can't verify the original system specs. Before signing a contract, call the Building Department directly and confirm the specific exemption for your situation. If they waive the permit, ask for written confirmation. If they require one, expect $150–$300 and a final inspection only. This gray area exists because the state energy code doesn't explicitly require a permit for true replacements, but Concord's interpretation can vary by inspector.
What's the federal tax credit for heat pumps, and do I need a permit to claim it?
The IRA (Inflation Reduction Act) offers a 30% tax credit up to $2,000 per heat pump for new installations on owner-occupied homes. To claim it, the IRS now requires proof of permit, proof of final inspection sign-off, and in some cases substantiation of the equipment being ENERGY STAR Most Efficient. Without a permit, you cannot claim the credit. A few states (MA, NY, VT) have taken additional steps to enforce this by requiring proof at the state rebate level too. Bottom line: the permit is not optional if you want the federal credit — and that $600–$2,000 refund usually exceeds the $150–$400 permit cost many times over.
Do I need to upgrade my electrical panel for a heat pump in Concord?
Possibly. A typical 2-ton cold-climate heat pump compressor draws 30–50 amps, and if it includes resistive backup strip heat, add another 30–40 amps. If your home has 100-amp service (common in older Concord homes), you likely need an upgrade to 150-amp or 200-amp to safely accommodate the new circuits. Concord's electrical inspector will flag undersized panels at rough electrical review, halting the project. To know upfront, have a contractor run an electrical load calc and submit it with the permit application. If an upgrade is needed, budget $3,500–$5,000 and an additional 2–3 weeks for the electrician to permit and complete the panel work.
How long does the permit process take from application to final inspection in Concord?
For a straightforward replacement or supplemental mini-split with no panel upgrades, expect 2–3 weeks: 3–5 business days for plan review (via the online portal) plus 1–2 weeks to schedule and complete the three inspections. For a system conversion or one requiring electrical panel upgrade, add 4–6 weeks to account for the panel permit and installation time. Concord's Building Department does NOT do expedited permits, but they are responsive to complete submittals, so working with a contractor who uploads a full Manual J and electrical load calc upfront cuts review time.
Is Concord an owner-builder jurisdiction for heat pump installation?
Technically, New Hampshire allows owner-builders to pull permits for owner-occupied projects, including HVAC. However, Concord's Building Department requires that the person pulling the permit (or signing the application) be licensed to perform the work or supervise it. For heat pumps, that means a licensed HVAC technician or contractor must sign the permit application and take responsibility for the install. Owner-builders are NOT common for HVAC because the mechanical, electrical, and refrigerant work is highly technical and code-specific. In practice, you will need to hire a licensed contractor. If you are an HVAC technician yourself with a current NH license, you may be able to pull your own permit; call the Building Department to confirm.
What if I'm in Bow, not Concord? Does Concord's code apply?
No. Bow, NH is a separate municipality with its own building department and code enforcement. If your property is in Bow, you must pull permits from Bow — not Concord — even if Concord is the nearest city or if a contractor is based there. Bow and Concord both adopt the 2015 IRC and IECC, so many rules are similar, but Bow's fee schedule, inspector availability, and online portal (if any) may differ. Always confirm your town jurisdiction by address (Bow or Concord tax records) before starting permitting. It's a common mistake.
Does Concord have a requirement for Manual J load calculation before I can pull a heat pump permit?
Yes. Concord explicitly requires an ACCA Manual J load calculation for any new heat pump, system conversion, or supplemental heat pump. The Manual J shows heating and cooling loads room-by-room and confirms that your heat pump size (and backup heat strategy) matches the actual building demand. Without it, your permit application will be rejected or your contractor will be asked to provide one during review, delaying approval. A Manual J usually costs $300–$500 and takes 1–2 days for a licensed contractor to complete (they gather insulation R-values, window specs, air-sealing details, and occupancy data). Some contractors bundle it into their quote; others charge separately. Make sure it's included before you sign a contract.
Are utility rebates in Concord available only if I have a permit?
Yes, in most cases. Eversource (the primary utility serving Concord) and National Grid offer New Hampshire ENERGY STAR Most Efficient heat pump rebates ($1,000–$2,500 per unit) but require proof of permit and final inspection sign-off. Some utilities also require pre-approval before installation. The rebate application process typically involves submitting the paid permit receipt, final inspection approval letter, and ENERGY STAR certification of the equipment. Without a permit, you forfeit these rebates. For homeowners, the rebate plus federal tax credit can fund 40–60% of a heat pump install, so permitting is financially essential.
What happens at the rough mechanical and electrical inspections for a heat pump?
Rough mechanical inspection: the inspector verifies outdoor condensing unit is set on a proper pad or footer (below 48-inch frost line if buried), refrigerant lines are routed safely away from windows and property lines (min. 3 feet per IRC M1305), isolation ball valves are installed on liquid and suction lines, and condensate line is sloped and drains to exterior (not into sump or crawl space). Rough electrical inspection: the inspector checks that the heat pump compressor circuit is on a dedicated breaker (usually 20 or 30 amps depending on load), wire gauge matches breaker size (typically 10-AWG for 1-ton mini-splits, 8-AWG for larger units), and the breaker is a heat-pump-rated type (QPD or Eaton HT if required by panel manufacturer). If any of these are wrong, the inspector tags it and you lose a week getting the contractor back out to fix it. Having your contractor pre-coordinate with the Building Department about inspection timing (a quick call) prevents missed appointments.
Will Concord require a permit if I'm just replacing the thermostat on an existing heat pump?
No. Thermostat replacement alone is always exempt from permitting in Concord and New Hampshire. If you're upgrading to a smart thermostat or adding zone control, that's still exempt as long as you're not modifying refrigerant lines, electrical circuits, or compressor operation. The only exception would be if your new thermostat requires a new 240-volt circuit or low-voltage wiring that triggers electrical code changes — very rare, but if in doubt, call the Building Department. In 99% of thermostat upgrades, no permit is needed.