Montgomery County Engineering Department

Building Permit — Unincorporated Montgomery County

A business building or altering any structure over 200 square feet in Montgomery County needs a building permit from the County's own Engineering Department, but only within a specific, narrow footprint: unincorporated Montgomery County that also sits outside the police jurisdictions of both the City of Montgomery and the Town of Pike Road — each extending three miles beyond its own corporate limits, so this is genuinely 'outside both three-mile police jurisdictions,' not merely 'outside city limits.' The county's own page states this scope in exactly those terms. For a non-flood-prone structure where construction begins within six months of permit issuance, the fee is a $100.00 minimum per structure. A flood-prone structure instead uses a sliding scale under the county's Floodplain Prevention Ordinance, effective December 16, 2025; the exact dollar figures for that sliding scale are not published online. A business inside the City of Montgomery or the Town of Pike Road, or within either one's three-mile police jurisdiction, gets its building permit from that city's or town's own building department instead, not from the County.