Building permits, zoning and septic in Borough of Avondale, Pennsylvania

At a glance

Building permits

UCC building permit required before covered work¹²

Zoning

Borough ordinance with base and overlay districts³⁷

Septic permits

Chester County Health Department; new systems, repairs and modifications⁸⁹

Well permits

County permit required, including private water-supply wells¹⁰

Occupancy

Residential UCC certificate of occupancy required before use¹¹

Agricultural buildings

Qualifying nonhabitable agricultural buildings excluded from the state construction act; zoning still applies¹²

Who to call

Contact details are copied from each office’s official page and were checked against it on October 15, 2026.

Do you need a building permit in Borough of Avondale, PA?

Avondale has adopted Pennsylvania’s Uniform Construction Code as its municipal building code, and a UCC building permit is required before covered construction begins.¹² Residential work issued a UCC permit must remain accessible for inspections, and the permit holder must notify the construction code official when work is ready.¹³ A residential building governed by the UCC cannot be used or occupied without a certificate of occupancy from the building code official.¹¹ Ask the borough Building Official to identify the building permit and inspection requirements for your proposed work.⁴

Who handles building permits and zoning in Borough of Avondale?

Avondale identifies LTL Consultants LTD as its Building and Code Officials company and publishes a residential building permit application on its forms page.⁴ Direct building-code questions to the borough Building Official using the contact below; send zoning questions to the borough Code Official.⁴⁵ The same borough page links a current fee schedule, so ask those offices which building permit and zoning fees apply to your project before submitting an application.⁵ Septic and well construction questions go to Chester County Health Department’s Sewage & Water program.⁶

Does Borough of Avondale have zoning, lot-size and setback rules?

Avondale has its own zoning ordinance, with residential, flexible-use, town-center, commercial and industrial base districts.³⁷ Avondale also lists carbonate, flood hazard, wetland protection, steep slope, woodland and airport hazard overlays.⁷ Ask the borough Code Official to identify the parcel’s base district and overlays, then confirm the permitted dwelling type, minimum lot size, setbacks, coverage and height for that district before choosing a house plan.⁵ We could not confirm the district-specific dimensional limits here; the borough Code Official is the contact for zoning questions.⁵

How do septic and well permits work inside Borough of Avondale?

Chester County Health Department issues on-lot sewage disposal and well construction permits, including for properties inside Avondale.⁶ New septic systems, repairs and modifications require a county permit, although the county exempts repairs that can be completed without digging equipment.⁹ Major new septic permits require soil testing, and completed systems must not be covered before final inspection and written approval from the county Sewage Enforcement Officer.⁹¹⁴ County well rules require a permit and an application by an appropriately licensed contractor; new construction must have public sewerage or a valid sewage permit.¹⁰

Can you live in an RV or tiny home in Borough of Avondale?

We could not confirm permission for residential RV occupancy, temporary camping during construction or a tiny home on an Avondale lot; ask the borough Code Official about the proposed use and parcel before buying a unit.⁵ Avondale’s zoning ordinance and district map are the starting point for that conversation.³⁷ For a new residence using a composting or incinerating toilet, Pennsylvania still requires an approved method to treat washwater or excess liquid, subject to the retaining-tank exception.¹⁵ A toilet choice alone therefore does not settle the new residence’s wastewater approvals; discuss the disposal plan with Chester County Health Department.¹⁵⁶

Building a home in Borough of Avondale: what comes first?

Start with the borough Code Official: confirm the proposed residential use and applicable zoning district and overlays.⁵⁷ Next, establish the sewage and water route with Chester County Health Department if the property will use on-lot sewage or a well.⁶ Obtain the UCC building permit before covered work, arrange required inspections as construction proceeds, and obtain the residential certificate of occupancy before moving in.²¹³¹¹ Development in a special flood hazard area requires municipal floodplain review, and a driveway built or changed on state highway land requires PennDOT approval.¹⁶¹⁷ For land outside Avondale, consult the Chester County guide and identify the municipality responsible for local applications.¹⁸

Watch-outs

• We could not confirm Avondale’s public water and sewer connection requirements; ask the borough Code Official before assuming an off-grid water or sewage arrangement is acceptable.⁵
• An agricultural building exclusion under Pennsylvania’s construction act requires qualifying agricultural use without habitable space and does not remove municipal zoning requirements.¹²
• Avondale’s flood hazard and other overlay districts can affect a parcel in addition to its base zoning district.⁷

Sources

1. Avondale Borough Code Ch. 190 Construction Codes, Uniform (Borough of Avondale), quoted and re-checked
2. Apply for a Uniform Construction Code Building Permit (Pennsylvania statewide rule), quoted and re-checked
3. Avondale Borough Code Ch. 430 Zoning, Art. I (Borough of Avondale), quoted and re-checked
4. Avondale Borough Building Official / LTL Consultants LTD (avondaleboro.net)
5. Avondale Borough Code Official (avondaleboro.net)
6. Chester County Health Department — Sewage & Water (chesco.org)
7. Avondale Borough Code Ch. 430 Zoning, Art. III Classifications of Districts (Borough of Avondale), quoted and re-checked
8. Sewage and Water Regulations, quoted and re-checked
9. Permits for On-Lot Sewage Disposal Systems, quoted and re-checked
10. Chester County Health Department Rules and Regulations, quoted and re-checked
11. Part XIV, Uniform Construction Code, Chapter 403 Administration (Pennsylvania statewide rule), quoted and re-checked
12. Pennsylvania Construction Code Act — Chapter 1 (Pennsylvania statewide rule), quoted and re-checked
13. Part XIV, Uniform Construction Code, Chapter 403 Administration (Pennsylvania statewide rule), quoted and re-checked
14. Application and Permit Procedure for On Lot Sewage Systems, quoted and re-checked
15. 25 Pa. Code § 73.65. Recycling toilet, incinerating toilet or composting toilet (Pennsylvania statewide rule), quoted and re-checked
16. PennsylvaniA Floodplain Development Guide (Pennsylvania statewide rule), quoted and re-checked
17. Apply for a PennDOT Highway Occupancy Permit (Pennsylvania statewide rule), quoted and re-checked
18. Local Registrations, Permits, Zoning (Pennsylvania statewide rule), quoted and re-checked

Written October 15, 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.