Building permits, zoning and septic rules in Baldwin Borough, Pennsylvania

At a glance

Building permit

Required for new construction, additions, decks and structural alterations; issued by the borough¹

Building code

Pennsylvania Uniform Construction Code, adopted by the borough⁵

Zoning

Borough zoning ordinance, Chapter 168, with R-1 and R-2 residential districts²⁶

Septic

Allegheny County Health Department Sewage Enforcement Officers⁴

Minimum lot, R-1

10,000 square feet, 70 feet wide at the setback line⁷

Minimum lot, R-2 single-family

7,000 square feet, 55 feet wide at the setback line⁸

Owner-builder

Pennsylvania has no statewide contractor license for most construction work; borough permits still apply⁹

Fees

Set by borough council resolution; amounts not confirmed here¹⁰

Who to call

Contact details are copied from each office’s official page and were checked against it on October 14, 2026.

Does Baldwin Borough have zoning, and what does it mean for lot size and setbacks?

Yes. Baldwin Borough has its own zoning ordinance, Chapter 168 of the borough code, and the borough, not Allegheny County, decides what can be built on a lot inside borough limits². Rules differ by district, so find your parcel's district on the borough's zoning map before you plan anything⁶.

In the R-1 residential district, the minimum lot is 10,000 square feet and 70 feet wide at the building setback line, with lot coverage capped at 35%⁷¹¹. R-1 dwellings need a 35-foot front setback and a 35-foot rear yard, with side yards of 5 feet on one side and 20 feet combined¹². Dwellings may reach 43 feet or three stories¹³.

In the R-2 district, a single-family detached house needs 7,000 square feet and 55 feet of width at the setback line⁸. R-2 setbacks are 35 feet in front, 30 feet in the rear and 5 feet on one side with 15 feet combined¹⁴.

Whether an RV, tiny home, manufactured home or accessory dwelling is allowed in a given district depends on the zoning ordinance's land use chart, which we could not confirm. Ask the Baldwin Borough Zoning Officer before you buy³.

Do you need a building permit in Baldwin Borough, and who issues it?

Yes. Baldwin Borough requires a building permit for new additions, structural alterations, decks, complete roof replacement and new construction¹. The borough's Department of Building Inspections and Code Enforcement issues the permit; Allegheny County does not¹.

The borough adopted the Pennsylvania Uniform Construction Code as its municipal building code⁵. Every building and zoning inquiry starts at the code enforcement desk¹. Residential construction permits require inspections, and the list is set when the permit is issued¹. A permit that has not been used lapses after 6 months, and once work starts the permit stays good for 5 years¹.

Smaller jobs fall under zoning permits instead: the borough's Zoning Officer handles accessory structures, fences and dumpsters³. Pennsylvania's Uniform Construction Code also requires a certificate of occupancy before a new building is used¹⁵. The borough's building permit fees are set by council resolution, and we could not confirm the amounts, so ask the code enforcement desk¹⁰.

How do septic permits work in Baldwin Borough?

Septic permits for on-lot sewage systems in Baldwin Borough come from the Allegheny County Health Department's Sewage Enforcement Officers, who act under Pennsylvania's Act 537⁴. A permit from the Department is needed before any construction of an on-lot system¹⁶.

Many lots inside the borough are on public sewer, and Allegheny County's sewage rules do not let an owner keep a private system when a building sits within 150 feet of an available public sewer¹⁷. Whether a specific parcel has sewer available is a question for the borough, and we could not confirm the borough's own sewer rules. Call the code enforcement desk before you assume an on-lot system is an option¹.

If a lot has no sewer, expect a site evaluation. Allegheny County soils rated not limited for a conventional drain field cover only 11.6% of the county, so many sites need a site evaluation or an engineered system¹⁸. Call the county Plumbing Program for septic questions¹⁹.

Building a home in Baldwin Borough: the steps, in order

1. Confirm the parcel's zoning district and whether your plan fits the lot size, setbacks and height for that district⁶. Ask the Zoning Officer³.
2. If your plans conflict with the zoning ordinance, apply for a variance from the Zoning Hearing Board³.
3. Confirm sewer availability, or arrange an on-lot septic permit through the Allegheny County Health Department⁴.
4. Submit a building permit application with plans and contractor information through the borough's code enforcement desk¹.
5. Request a PennDOT highway occupancy permit if the driveway connects to a state highway²⁰.
6. Keep work accessible and call for the required inspections, then obtain a certificate of occupancy before moving in²¹²².

What stays with Allegheny County, and what should you check before you buy?

Septic permits, plumbing permits and health department matters stay with Allegheny County even inside Baldwin Borough⁴²³. Land outside Baldwin Borough follows other municipalities' rules; see the Allegheny County page for the county picture.

Before buying, check floodplain status: Pennsylvania municipalities must issue a floodplain development permit before development in a Special Flood Hazard Area²⁴. Building permit applications for construction in a flood plain need documentation sealed by a registered design professional²⁵.

On cost, Allegheny County's effective property tax rate is 1.6%²⁶. Pennsylvania does not license most construction contractors statewide, and municipalities may set their own contractor requirements, so ask the borough what it requires of the person doing the work⁹.

Watch-outs

• The borough's zoning and building permit rules apply only inside Baldwin Borough limits, not in neighboring municipalities².
• Zoning rules differ by district, so the lot size and setbacks above apply only in the R-1 and R-2 districts named⁶.
• Whether RVs, tiny homes, manufactured homes or accessory dwellings are allowed, and the borough's permit fee amounts, are not confirmed here; ask the code enforcement desk¹.
• Driveways onto a state highway need a PennDOT highway occupancy permit in addition to borough approval²⁰.

Sources

1. Baldwin Borough Department of Building Inspections and Code Enforcement (baldwinborough.org)
2. Borough of Baldwin, PA code of ordinances table of contents (eCode360) (Borough of Baldwin), quoted and re-checked
3. Baldwin Borough Zoning Officer (baldwinborough.org)
4. Water Pollution Control, quoted and re-checked
5. Chapter 83 Construction Codes, Uniform - Borough of Baldwin (Borough of Baldwin), quoted and re-checked
6. Chapter 168 Zoning, Article III Zoning Districts and Zoning Map - Borough of Baldwin (Borough of Baldwin), quoted and re-checked
7. Chapter 168 Zoning, Article III Zoning Districts and Zoning Map - Borough of Baldwin (Borough of Baldwin), quoted and re-checked
8. Chapter 168 Zoning, Article III Zoning Districts and Zoning Map - Borough of Baldwin (Borough of Baldwin), quoted and re-checked
9. Contractor Licensing (Pennsylvania statewide rule), quoted and re-checked
10. Chapter 83 Construction Codes, Uniform - Borough of Baldwin (Borough of Baldwin), quoted and re-checked
11. Chapter 168 Zoning, Article III Zoning Districts and Zoning Map - Borough of Baldwin (Borough of Baldwin), quoted and re-checked
12. Chapter 168 Zoning, Article III Zoning Districts and Zoning Map - Borough of Baldwin (Borough of Baldwin), quoted and re-checked
13. Chapter 168 Zoning, Article III Zoning Districts and Zoning Map - Borough of Baldwin (Borough of Baldwin), quoted and re-checked
14. Chapter 168 Zoning, Article III Zoning Districts and Zoning Map - Borough of Baldwin (Borough of Baldwin), quoted and re-checked
15. Apply for a Uniform Construction Code Building Permit, quoted and re-checked
16. Water Pollution Control, quoted and re-checked
17. Article XIV Sewage Management, quoted and re-checked
18. 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
19. Allegheny County Health Department, Plumbing Program (alleghenycounty.us)
20. Apply for a PennDOT Highway Occupancy Permit (Pennsylvania statewide rule), quoted and re-checked
21. Part XIV, Uniform Construction Code, Chapter 403 Administration (Pennsylvania statewide rule), quoted and re-checked
22. Part XIV, Uniform Construction Code, Chapter 403 Administration (Pennsylvania statewide rule), quoted and re-checked
23. Project Plans and Permitting, quoted and re-checked
24. PennsylvaniA Floodplain Development Guide (Pennsylvania statewide rule), quoted and re-checked
25. Apply for a Uniform Construction Code Building Permit, quoted and re-checked
26. Effective property tax rate: Bolthole Index county data

Written October 14, 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.