Fence height rules in Dennis, Massachusetts
South of Route 6, a typical fence needs no zoning approval: Dennis's zoning bylaw sets no fence height limit or setback (fences aren't "structures" under it), and its only fence rule is a corner-lot sight triangle (nothing over 2½ feet above street grade within 20 feet of the intersection). North of Route 6 you're in the Old King's Highway Historic District, where every fence needs a certificate from the Dennis OKH Committee; wooden fences 4 feet or lower in listed styles can get a certificate of exemption without a hearing, and others need full review.
| Corner-lot sight triangle | Nothing over 2½ ft above street grade within 20 ft of the intersection [1] |
| General zoning fence height limit | None in the zoning bylaw [2] |
| Old King's Highway district (north of Route 6) | Certificate of appropriateness or exemption needed before erecting a fence [4] |
| OKH exemption for simple fences | Wooden fences up to 4 ft in listed styles, finished side facing out [5] |
| Floodplain district | Permit required for fences [6] |
What the zoning bylaw says
The Dennis Zoning By-Law has no general height limit or property-line setback for residential fences. Its one fence rule is a corner-lot sight triangle: no fence, wall, hedge or shrub may block vision more than 2½ feet above street grade inside the triangle formed by the two street lines and a line joining points 20 feet from their intersection [1]. The bylaw's definition of "structure" excludes fences [2], so the setbacks for structures don't appear to apply to them. The bylaw's yard definition likewise lists fences as an allowed yard feature.
Old King's Highway Historic District (north of Route 6)
The part of Dennis north of the Route 6 (Mid-Cape Highway) center line is in the Old King's Highway Regional Historic District [3]. Under the district act, fences count as "structures" (along with stone walls, hedges and gates), and nothing may be erected until the Dennis OKH Committee issues a certificate of appropriateness or a certificate of exemption. The building inspector can't issue a permit without one [4]. The Commission lists wooden fences 4 feet or lower as eligible for an exemption without a hearing, if they suit the site, have the finished side facing out, and use one of the listed styles: natural post-and-rail, white or natural square rail or picket, or flat board with a cap rail [5]. A site plan is required. Taller fences, other materials or other styles go through a full certificate-of-appropriateness review. Features not visible from a way or public place can also be exempted with a site plan.
Floodplain and wetlands
In the floodplain overlay district, a permit is required for development, including fences [6]. Fence work near wetlands may also need Conservation Commission review.
State building-code and spite-fence rules still apply (see the state section). Check with the Building Department before you build.
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Next steps
- Check whether your property is north of Route 6 (Old King's Highway district) or in a mapped flood zone.
- North of Route 6: apply to the Dennis Old King's Highway Committee for a Certificate of Exemption (a wooden fence 4 ft or lower in an approved style, with a site plan) or a Certificate of Appropriateness for anything else.
- On a corner lot, keep the 20-ft sight triangle clear above 2½ ft.
- Confirm permit needs with the Dennis Building Department (508-760-6157), especially for fences over 7 ft or in a flood zone.
Common questions
- Do I need a permit for a fence in Dennis, MA?
- It depends on location. South of Route 6, a typical fence needs no zoning approval. North of Route 6 you're in the Old King's Highway Historic District, where every fence needs a certificate from the Dennis OKH Committee. Fences in the floodplain district need a permit.
- How tall can a fence be in Dennis, Massachusetts?
- Dennis's zoning bylaw sets no fence height limit or setback. In the Old King's Highway district, wooden fences 4 feet or lower in listed styles can get a certificate of exemption without a hearing; others need full review.
- What are the corner lot fence rules in Dennis, MA?
- On a corner lot, nothing may block vision more than 2½ feet above street grade within the triangle formed by the street lines and points 20 feet from the intersection.
- What fences are exempt in the Old King's Highway district in Dennis, Massachusetts?
- Wooden fences up to 4 feet with the finished side facing out, in listed styles such as post-and-rail, square rail or picket, or flat board with a cap rail. A site plan is required.
Massachusetts state rules on fences
Most fence rules in Massachusetts are local, set in your town's zoning bylaw and sometimes historic-district rules. A few state laws apply everywhere:
- Building permit: the State Building Code (780 CMR, 10th edition) does not require a building permit for fences 7 feet high or less. Taller fences need one. Zoning height limits and setbacks still apply, and many towns cap fences at 6 feet.
- Spite fences: under M.G.L. c. 49, §21, a fence that unnecessarily exceeds 6 feet and is maliciously put up or kept to annoy a neighbor is a private nuisance. The neighbor can sue for damages.
- Fence viewers: every town must appoint fence viewers each year (c. 49, §1). Where adjoining owners both enclose and use their land, they share the upkeep of the partition fence equally unless they agree otherwise. If one side won't repair their share, the other can complain to the fence viewers, who can order the repair (c. 49, §§3–4). By statute, a "legal and sufficient" fence is 4 feet high and in good repair (c. 49, §2).
- Pool fences must meet the state pool barrier rules (see Pools).
- Wetlands: fence work in a wetland or within 100 feet of one may need Conservation Commission review.
What the bylaw says
- § 2.3.3.4, Dennis Zoning By-Law (amended through and including ATM May 6, 2025), p. 25
2.3.3.4 No fence, wall, hedge, shrubbery, or other obstruction shall block vision of a public or private way two and one-half (2½) feet above street grade on a corner lot within a triangular area formed by the intersecting street lines and a straight line which joins points on such street lines twenty (20) feet from their intersection.
- Section 5 Definitions, STRUCTURE, Dennis Zoning By-Law (amended through and including ATM May 6, 2025), p. 92
STRUCTURE: An assembled combination of materials at a fixed location to give support or shelter, exclusive of boundary or retaining walls, fences, flag poles, self contained heating or ventilating equipment and the like.
- OKH Act, Section 2 (district boundary), Old King's Highway Regional Historic District Commission Bulletin (March 1, 2022) incl. OKH Act, p. 5
thence continuing by the center line of said state highway layout of Route 6 - Mid-Cape Highway, in a southerly, southeasterly, easterly, and northeasterly direction, traversing the towns of Sandwich, Barnstable, Yarmouth, and Dennis to the boundary line between the Town of Dennis and the Town of Harwich
- OKH Act, Section 6 - Limitations, Old King's Highway Regional Historic District Commission Bulletin (March 1, 2022) incl. OKH Act, p. 9
No building, structure or part thereof, except as hereinafter provided, shall be erected within the District unless and until an application for a certificate of appropriateness as to the exterior architectural features shall have been filed with the Committee. Either a certificate of appropriateness or a certificate of exemption shall be issued by the Committee before erection.
- 972 CMR 3:04(a) Fences, Old King's Highway Regional Historic District Commission Bulletin (March 1, 2022) incl. OKH Act, p. 25
(a.) Fences: Wooden fences, not higher than 4 feet, may be allowed, as an exempt item, if appropriate for the site and associated structure, provided the finished side of the fence faces out from the fenced area, in the following styles:
- § 6.2.5 Permits, Dennis Zoning By-Law (amended through and including ATM May 6, 2025), p. 95
construction or changes to existing buildings, placement of manufactured homes, placement of agricultural facilities, fences, sheds, storage facilities or drilling, mining, paving and any other development that might increase flooding or adversely impact flood risks to other properties.