Building permits, zoning and land rules in Montgomery County, Pennsylvania

At a glance

Building permit

Required before work covered by the Pennsylvania Uniform Construction Code begins¹

Building inspections

Required for covered building and systems work⁶

Zoning

Handled by the township, borough or city rather than as one countywide system³⁷

Septic

County Office of Public Health permit and inspection required for on-lot systems⁸⁹

Private wells

County permit required before installing a drinking-water, irrigation or geothermal well⁵

RV or tiny home

No countywide occupancy answer was confirmed; ask the parcel's municipality³

Owner-builder

No exemption was confirmed; ask the local code office before relying on one¹⁰

Who to call

Contact details are copied from each office’s official page and were checked against it on September 27, 2026.

Do you need a building permit in Montgomery County, Pennsylvania?

Yes. Montgomery County property owners must obtain a construction or 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 also require inspections⁶. A certificate of occupancy must be issued before a UCC-regulated building or facility can be used¹¹. Emergency repairs or equipment replacement may begin without a permit 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 remain¹².

Who issues building permits in Montgomery County, Pennsylvania?

Montgomery County does not operate one building-permit counter for every parcel; Pennsylvania's Uniform Construction Code may be administered by a municipality, a certified third-party agency or the Department of Labor and Industry depending on the municipality's election or opt-out status¹². Start with the township, borough or city where the parcel lies because local permit and zoning questions are directed there⁷. The Montgomery County Planning Commission can help with county planning resources at 610-278-3722, [email protected], or 425 Swede Street in Norristown¹³. No owner-builder exemption was confirmed in the reviewed materials, so ask the responsible code office before assuming that doing the work yourself changes permit or inspection duties¹⁰.

Does Montgomery County, Pennsylvania have zoning?

Montgomery County's municipalities enact and administer zoning; the county Planning Commission assists with planning but does not administer municipal zoning³. Pennsylvania directs zoning questions to the township, borough or city where the project will operate⁷. County zoning authority is limited to land in a municipality without its own zoning ordinance and ends there when a municipal ordinance takes effect¹⁴. That makes the parcel's municipality the source for allowed uses, setbacks, building height, lot coverage and minimum dwelling or lot size; no single countywide rule for those subjects was confirmed³. Subdivision and land-development proposals receive county Planning Commission review before municipal action, but county review is advisory and the municipality makes the final decision¹⁵.

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 system⁴⁸. The county process begins with soil probes and percolation testing; if the site is suitable, the applicant submits a system design and permit application for approval⁸. After installation, county Sewage Enforcement Officers inspect the system and provide final approval for use⁹. 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 buildable¹⁶. State law includes a conditional exemption for an owner or immediate-family residence on a contiguous tract of at least 10 acres, but siting and notice conditions still apply¹⁷. Contact OPH at 610-278-5117 or [email protected]¹⁸.

Can you live in an RV or tiny home in Montgomery County, Pennsylvania?

No countywide rule confirming residential RV occupancy, temporary private-land camping or tiny-home occupancy was found in the reviewed official materials. Because Montgomery County municipalities administer zoning, ask the parcel's township, borough or city whether the proposed unit is a permitted dwelling, where it may sit, and what dimensional rules apply³⁷. 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 land¹⁹. 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 parcel²⁰. 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 exceptions²¹.

What are the steps to build a home in Montgomery County?

1. Identify the parcel's township, borough or city, then obtain its zoning and permit requirements³⁷.
2. If the project uses on-lot sewage, arrange the county soil evaluation and obtain OPH design approval and a permit⁸.
3. Before installing a drinking-water, irrigation or geothermal well, obtain the county Permit to Construct; monitoring, agricultural and test wells are exempt⁵.
4. Obtain the UCC building permit from the responsible municipality, certified agency or state office before covered work begins¹.
5. Complete the required building and system inspections and obtain the certificate of occupancy before use⁶¹¹.
6. If development lies in a Special Flood Hazard Area, obtain the municipal floodplain development permit before work starts²².
7. A new or changed driveway on state highway land needs a PennDOT Highway Occupancy Permit²³.

What should you check before buying land in Montgomery County?

Check the municipality first: zoning, building administration and parcel-specific dimensional standards turn on the township, borough or city rather than one countywide office³⁷. 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 wells¹⁶⁸⁵. For a subdivision or land-development proposal, plan for advisory county review before the municipality makes the final decision¹⁵. Confirm floodplain status and state-highway access because municipal floodplain approval and a PennDOT access permit can be separate from the building permit²²²³. The effective property-tax rate is about 1.4%, and the median annual property-tax bill is about $5,776²⁴²⁵.

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 license⁵²⁶.
• A parcel of at least 10 acres is not automatically exempt from septic permitting; the state exemption also has ownership, occupancy, siting and notice conditions¹⁷.
• No countywide answer was confirmed for RV living, temporary camping, tiny homes, setbacks or minimum dwelling size; obtain the rule from the parcel's municipality³.

Sources

1. Apply for a Uniform Construction Code Building Permit, quoted and re-checked
2. Uniform Construction Code (UCC) (Pennsylvania statewide rule), quoted and re-checked
3. Montgomery County PA - Planning Commission (2026 county census)
4. On-Lot Sewage Permitting, quoted and re-checked
5. Individual Water Supply Well Permitting, quoted and re-checked
6. Apply for a Uniform Construction Code Building Permit, quoted and re-checked
7. Local Registrations, Permits, Zoning (Pennsylvania statewide rule), quoted and re-checked
8. On-Lot Sewage Permitting, quoted and re-checked
9. On-Lot Sewage Permitting, quoted and re-checked
10. (2026 county census)
11. Apply for a Uniform Construction Code Building Permit, quoted and re-checked
12. Pennsylvania Construction Code Act — Chapter 1 (Pennsylvania statewide rule), quoted and re-checked
13. Montgomery County Planning Commission (montgomerycountypa.gov)
14. Pennsylvania Municipalities Planning Code (Pennsylvania statewide rule), quoted and re-checked
15. Subdivision & Land Development Reviews, quoted and re-checked
16. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
17. 25 Pa. Code § 72.22. Permit issuance (Pennsylvania statewide rule), quoted and re-checked
18. Montgomery County Office of Public Health (OPH) (montgomerycountypa.gov)
19. RV and Tent Campsites (Pennsylvania statewide rule), quoted and re-checked
20. Pennsylvania Uniform Construction Code, Chapter 403 (Pennsylvania statewide rule), quoted and re-checked
21. 25 Pa. Code § 73.65. Recycling toilet, incinerating toilet or composting toilet (Pennsylvania statewide rule), quoted and re-checked
22. PennsylvaniA Floodplain Development Guide (Pennsylvania statewide rule), quoted and re-checked
23. Apply for a PennDOT Highway Occupancy Permit (Pennsylvania statewide rule), quoted and re-checked
24. Effective property tax rate: Bolthole Index county data
25. Median property tax bill: Bolthole Index county data
26. Apply for a Water Well Drillers License and Rig Permit (Pennsylvania statewide rule), quoted and re-checked

Written September 27, 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.