Coos County, New Hampshire
Town of Milan is a town in Coos County, New Hampshire. Septic permits inside Town of Milan come from the state health agency. 9 rules below are quoted from official sources and independently re-checked, most recently on October 29, 2026. Rules for unincorporated land are on the Coos County page.
Construction, extension, removal, or alteration of a building or structure inside Milan town; this also includes swimming pools, manufactured housing, and exterior signs.
“A building permit shall be obtained before a building or structure is constructed, extended, removed or altered. This requirement also applies to swimming pools, manufactured housing and exterior signs.”
All land inside Milan town.
number of town-wide zoning districts: 1
“For the purpose of regulating the use of land and the location and construction of buildings, the Town, after adopting the provisions of this ordinance, shall be considered as one district with the following regulations and restrictions.”
Conventional lots inside Milan town's single town-wide zoning district.
minimum lot size: >= 1 acre (Except in an open space cluster development as determined by the Planning Board.)
“The minimum lot size is based upon the soil characteristics of the lot as determined by the minimum lot size by soil type standards in the Milan Subdivision Regulations. The minimum lot size shall, in no case, be less that one (1) acre, except in a open space cluster development as determined by the Planning Board. Only one dwelling is allowed per lot.”
Travel trailers on private land inside Milan town.
construction-related trailer permission: <= 6 months (Subject to Building Inspector review at expiration.) · nonpaying guest trailer: <= 90 days per year
“The temporary use of a trailer by a person engaged in adjoining construction work or for whom a dwelling is being built provided that such use is shown to be a temporary expedient, may be permitted by the Building Inspector. The Building Inspector shall grant such permission for a period not to exceed six (6) months excepting that he/she may review at his/her discretion such permission at the expiration of said six (6)months.”
Open-space cluster residential development inside Milan town.
“An open space cluster development shall be a permitted use throughout the Town of Milan. Such a development shall require subdivision approval by the Planning Board under the Milan Subdivision Regulations, regardless of whether any lot lines are created, or what form of ownership is contemplated. The Selectmen or Building Inspector may issue permits after the Planning Board has approved the final plat.”
Milan building-permit applications.
“A building permit application shall be on a form provided by the Town, and shall furnish all requested information, and be accompanied by a permit fee, based on a fee schedule established by the Selectmen.”
Town of Milan does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Installation of a replacement individual sewage disposal system serving an owner's own domicile inside Milan town.
“individual may install the replacement ISDS”
Land uses and individual sewage disposal systems inside Milan town.
“written approval for construction of an ISDS”
We looked and could not find an official answer yet. Silence is not permission; ask Town of Milan or Coos County directly.
Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.
Unanswered questions are usually a sign that Town of Milan publishes no rule on the point, not that none exists. Coos County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Town of Milan means bringing your own water and power. The kit we’d start with:
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