Montgomery County, Pennsylvania requires a building permit before work covered by the statewide Uniform Construction Code begins, but the parcel's municipality or a certified third-party agency issues it, not the county1. Zoning approval also comes from the municipality, because all 62 municipalities have their own zoning ordinances and maps2. Septic permits for on-lot systems, and well permits for drinking-water, irrigation and geothermal wells, come from the county Office of Public Health regardless of municipality3,4.
Do you need a building permit in Montgomery County, Pennsylvania?
Yes.
Yes. Montgomery County property owners must obtain a building permit before starting work covered by Pennsylvania's Uniform Construction Code1. Covered construction and changes to residential or commercial buildings, electrical, gas, mechanical or plumbing systems, pools, hot tubs, and specified manufactured or industrialized housing work require inspections1. A certificate of occupancy must be issued before a UCC-regulated building or facility can be used1. Emergency repairs or equipment replacement may begin before permit issuance only when an application reaches the building code official within three business days1. Qualifying agricultural buildings without habitable space are excluded from the state Construction Code Act, but municipal land-use and other applicable requirements may remain6.
Who issues building permits in Montgomery County, Pennsylvania?
Montgomery County does not operate one building-permit counter for every parcel; the applicable municipality or a certified third-party agency administers Pennsylvania Uniform Construction Code permits.
Montgomery County does not operate one building-permit counter for every parcel; the applicable municipality or a certified third-party agency administers Pennsylvania Uniform Construction Code permits1. Start with the township, borough or city where the parcel lies for building permits and zoning approval, because all 62 municipalities have their own zoning ordinances and maps2. Building-permit fees vary: fees charged by municipalities or their third-party agencies are not regulated by statute or regulation7. Septic and well permits do not move to the municipality: the county Office of Public Health issues them at 610-278-51173,4,8. The Montgomery County Planning Commission can help with county planning resources at 610-278-3722, planning@montgomerycountypa.gov, or 425 Swede Street in Norristown9. Pennsylvania generally does not license most construction contractors statewide and excludes uncompensated work by an owner on the owner's residence from home-improvement regulation, but that does not create an exemption from building permits or inspections; ask the responsible local code office about any contractor rules1,5.
Does Montgomery County, Pennsylvania have zoning?
All 62 Montgomery County municipalities have zoning ordinances and maps, and the rules vary by municipality.
All 62 Montgomery County municipalities have zoning ordinances and maps, and the rules vary by municipality2. The parcel's township, borough or city is therefore the source for allowed uses, setbacks, building height, lot coverage and minimum dwelling or lot size2. Montgomery County's Planning Commission reviews proposed municipal zoning amendments, but that review does not replace the municipality's ordinance or decision2. Subdivision and land-development proposals must also reach the county Planning Commission before municipal action; county review is advisory, and the municipality makes the final decision10. For a purchase decision, identify both the municipality and zoning district before assuming an RV, tiny home, accessory dwelling or short-term rental is allowed2.
How do septic permits work in Montgomery County, Pennsylvania?
Montgomery County's Office of Public Health requires a permit to construct or modify an on-lot sewage disposal system, with applications submitted to the Sewage Enforcement Officer serving the property's territory.
Montgomery County's Office of Public Health requires a permit to construct or modify an on-lot sewage disposal system, with applications submitted to the Sewage Enforcement Officer serving the property's territory3. The published process starts with soil probes and percolation testing; if the site is suitable, the applicant submits a system design and permit application for approval3. After installation, county Sewage Enforcement Officers inspect the system and provide final approval for use3. Only 28.3% of county soils are rated without severe limits for a conventional drain field, so establish septic feasibility before treating a buildable-looking lot as buildable11. State law includes a conditional exemption for an owner or immediate-family residence on a contiguous tract of at least 10 acres, but ownership, siting and notice conditions still apply12. Contact OPH at 610-278-5117 or publichealth@montgomerycountypa.gov8.
Can you live in an RV or tiny home in Montgomery County, Pennsylvania?
We could not confirm one Montgomery County rule for residential RV occupancy, temporary private-land camping or tiny-home occupancy.
We could not confirm one Montgomery County rule for residential RV occupancy, temporary private-land camping or tiny-home occupancy. All 62 municipalities have zoning ordinances and maps, so ask the parcel's township, borough or city whether the proposed unit is a permitted dwelling, where it may sit and what dimensional rules apply2. Pennsylvania's state-park campground limits apply only in state park campgrounds and do not answer whether someone may live in an RV on private land13. A manufactured home bearing the required federal label has state construction-code treatment, but that does not establish local land-use permission for a particular parcel14. A new residence using a composting or similar water-conservation toilet still needs an approved method for washwater or excess liquid under the same permit, subject to the state rule's exceptions15.
What are the steps to build a home in Montgomery County?
Identify the parcel's township, borough or city, then read its zoning ordinance and map.
- Identify the parcel's township, borough or city, then read its zoning ordinance and map2.
- If the project uses on-lot sewage, arrange soil probes and percolation testing, then obtain OPH design approval and a permit if the site is suitable3.
- Before installing a drinking-water, irrigation or geothermal well, obtain the county Permit to Construct; monitoring, agricultural and test wells are exempt4.
- Obtain the UCC building permit from the applicable municipality or certified agency before covered work begins1.
- Complete the required inspections and obtain the certificate of occupancy before use; completed construction also needs written proof of passed inspections before public electric or gas connection1,16.
- For floodplain construction, include the required sealed flood documentation with the UCC application1.
- If access is from a Commonwealth highway, obtain the required PennDOT highway occupancy permit before driveway access16.
What should you check before buying land in Montgomery County?
Check the municipality first: zoning and parcel-specific dimensional standards turn on the township, borough or city, and all 62 municipalities have zoning ordinances and maps.
Check the municipality first: zoning and parcel-specific dimensional standards turn on the township, borough or city, and all 62 municipalities have zoning ordinances and maps2. Check wastewater and water next: only 28.3% of soils are rated without severe conventional-drain-field limits, and county permits cover on-lot sewage systems plus drinking-water, irrigation and geothermal wells3,4,11. For a subdivision or land-development proposal, plan for advisory county review before the municipality makes the final decision10. Confirm floodplain conditions and state-highway access early because floodplain documentation and a PennDOT access permit can add separate requirements to the UCC process1,16. The effective property-tax rate is about 1.4%, and the median annual property-tax bill is about $5,77611.
Watch-outs
- Montgomery County's well rule is stricter than a state driller-license exemption suggests: drinking-water, irrigation and geothermal wells need an OPH permit before installation even when state law does not require a homeowner drilling a personal well to hold a commercial driller license4,17.
- A parcel of at least 10 acres is not automatically exempt from septic permitting; the state exemption also has ownership, occupancy, siting and notice conditions12.
- No single countywide answer was confirmed for RV living, temporary camping, tiny homes, setbacks or minimum dwelling size; obtain the rule from the parcel's municipality2.
Sources
17 official pages, each quoted and re-checked · written October 9, 2026
- Apply for a Uniform Construction Code Building Permit
- 2021 Annual Summary Subdivision, Land Development and Zoning Activity (Montgomery County Planning Commission)
- On-Lot Sewage Permitting
- Individual Water Supply Well Permitting
- Contractor Licensing (Pennsylvania statewide rule)
- Pennsylvania Construction Code Act — Chapter 1 (Pennsylvania statewide rule)
- Fee Schedule - UCC Buildings
- Montgomery County Office of Public Health (OPH) (montgomerycountypa.gov)
- Montgomery County Planning Commission (montgomerycountypa.gov)
- Subdivision & Land Development Reviews
- Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
- 25 Pa. Code § 72.22. Permit issuance (Pennsylvania statewide rule)
- RV and Tent Campsites (Pennsylvania statewide rule)
- Pennsylvania Uniform Construction Code, Chapter 403 (Pennsylvania statewide rule)
- 25 Pa. Code § 73.65. Recycling toilet, incinerating toilet or composting toilet (Pennsylvania statewide rule)
- pa.gov
- Apply for a Water Well Drillers License and Rig Permit (Pennsylvania statewide rule)
Written October 9, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.
Off-grid gear
Going off-grid in Montgomery County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
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