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Fence Companies for Installation and Repair in Merrimack, NH
Merrimack's own Development Guide puts fences on its short list of work that needs no building permit, so the planning here is about wetland buffers, flood corridors and the pool, not the permit counter. Call (978) 800-2452 or use the form. A person reads every request and replies with what happens next.
- Free for homeowners
- Merrimack permit and wetland notes on this page
- Souhegan River to Baboosic Brook
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Fences in Merrimack
Which fence job is it?
Wood Fences
Privacy, picket, stockade and split-rail fences in cedar or pressure-treated lumber, new or replaced.
Vinyl Fences
Low-upkeep PVC privacy, semi-privacy and picket fences, with matching gates.
Chain Link & Aluminum
Galvanized or coated chain link and ornamental aluminum, including pool enclosures built to code.
Fence Repair
Leaning or rotted posts, sagging gates, storm-damaged sections and broken pickets or panels.
Pool going in, or a lot that backs onto wetland?
(978) 800-2452Give us the street and what the fence has to enclose, and we'll connect you with a company that knows Merrimack's pool and wetland steps.
Permits
Fence permits in Merrimack
What the town says. Page 15 of the Town of Merrimack Development Guide (2023) opens by requiring a building permit for all residential construction and remodeling, then lists the exceptions: "A permit is not required for" small residential accessory structures under 160 square feet, fences, landscaping, non-structural roofing, ordinary repairs and same-size door or window replacements (Development Guide). That covers the fence itself. It does not override the wetland and flood rules further down this page, and it does not cover the pool a fence is built around.
Who to ask. Permits run through the Building & Code Enforcement Division, part of Merrimack Fire & Rescue, and applications are filed on the town's OpenGov portal; inspection requests need at least 24 to 48 hours' notice (Permits & Forms, Inspections).
- Building permit for a fence
- Not required (Development Guide, 2023)
- Pool
- Swimming Pool Application plus electrical permit
- Pool heater
- Gas/mechanical permit
- Filing
- OpenGov portal
- Office
- Building & Code Enforcement Division
New Hampshire basics. Merrimack's own code page sets out the state timeline: the 2024 State Building Code took effect July 1, 2026, the concurrence period runs to December 31, 2026, and from January 1, 2027 all permit requests follow the 2024 codes (NH State Building Code laws). Fence companies need no state license, so the Attorney General's checklist is what protects you: references, proof of insurance, a written contract before money changes hands, and caution about deposits over half the price (NH AG). See our New Hampshire rules page.
Post holes and Dig Safe. State law asks for notice to Dig Safe at least 72 hours before digging, weekends and holidays not counted, with the area marked in white beforehand; the ticket lasts 30 days (RSA 374). Dig Safe says property owners and contractors are both required by law to notify it (Dig Safe), and its homeowner brochure lists fencing among the projects to call about; call 811 (Dig Safe homeowner brochure). The notice rule in RSA 374:51 covers digging within 100 feet of an underground facility.
Last verified November 2026. Fees, restrictions and deadlines on this page are due for re-checking by January 2027. New England Fence Pros is a referral service: we don't build fences or pull permits, and the company you hire handles the paperwork.
Height and placement
Height limits, setbacks and corner lots in Merrimack
No height rule we could read. In the part of the 2024 Zoning Ordinance we could read, the only fence mention is a security fence around telecommunication towers, and we could not find a residential fence height cap, a corner sight-line distance or a finished-side rule in the text the town posts (Zoning Ordinance). Before a tall fence goes up near the road or a driveway, ask the Building & Code Enforcement Division. For the boundary itself, a survey or the plot plan on file is the way to confirm where the line runs.
A state limit on spite. Under RSA 476:1, a fence that unnecessarily exceeds 5 feet and is kept up to annoy the neighbors is a private nuisance.
Pool fences. Merrimack posts no barrier rule of its own; its permit checklist sends every above-ground and in-ground pool through a Swimming Pool Application plus an electrical permit (permit checklist). The barrier follows the swimming pool code New Hampshire adopts with its building code. CPSC guidance, which is advisory, describes a barrier at least 48 inches tall with self-closing, self-latching gates that open outward from the pool (CPSC Pub. 362).
Wetlands and flood corridors
Historic districts and wetlands in Merrimack
No historic district. Merrimack posts no local historic district. Its Heritage Commission, formed in 2000, looks after landmarks such as the Olde Kings Highway, Chamberlain Bridge and Thornton Cemetery, and the town posts no permit review role for it (Heritage Commission).
Wetland buffers. A September 24, 2025 ZBA agenda describes "the 25 foot wetland buffer, which is part of the Wetland Conservation District," with work there heard as a special exception (ZBA agenda). A March 2023 case cites a required 40-foot setback from a wetland boundary, with anything closer going to a variance; that case was about sign posts (2023 ZBA agenda). Neither one settles how a fence is treated, so if a back yard slopes into wet ground, get an answer from the town before the post layout is marked.
Flood corridors. The Flood Hazard Conservation District uses FEMA maps dated September 25, 2009. The 2021 hazard mitigation plan lists the Merrimack River, Souhegan River and Baboosic Brook as flood corridors and calls the Island Drive area particularly prone to flooding (Hazard Mitigation Plan).
Merrimack's homes
A newer town of single-family lots
Of Merrimack's 10,264 housing units, 8,609 are single-family homes (NHES community profile). Only about 5% were built before 1950, according to a state lead data brief from April 2023 (NH DHHS).
That makes most fence work here a matter of enclosing a yard for kids, dogs or a pool, or replacing an original wood fence that has weathered out, rather than matching period details on an old house.
FAQ
Merrimack fence questions
Does Merrimack require a building permit for a fence?
Not according to the town. The 2023 Development Guide says a permit is not required for fences, landscaping, residential accessory structures under 160 square feet and a few other items. Wetland, flood and pool rules can still apply, so check those before the fence goes in.
What does a pool fence job need in Merrimack?
The pool is the permit job. The town checklist calls for a Swimming Pool Application plus an electrical permit for both above-ground and in-ground pools, filed through the OpenGov portal. The barrier itself follows the swimming pool code adopted with the state building code.
Can I fence a back yard that runs into a wetland in Merrimack?
Ask first. A September 2025 ZBA agenda describes a 25-foot wetland buffer that is part of the Wetland Conservation District, with work there handled as a special exception, and a 2023 case cited a 40-foot setback from the wetland edge. The cases we found did not involve fences, so ask the town how a fence is treated.
Which parts of Merrimack flood?
The Flood Hazard Conservation District follows FEMA maps dated September 25, 2009, and the 2021 hazard mitigation plan names the Merrimack and Souhegan Rivers and Baboosic Brook as flood corridors, with the Island Drive area especially prone to flooding.
What does it cost me to use New England Fence Pros?
Nothing. Asking is free for homeowners; the contractor prices the job, and the price and contract are between you and them.
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