Do I need a permit for addition or structural alteration in Lower Merion?
Yes. In Pennsylvania, addition or structural alteration generally requires a permit, and Lower Merion is no exception.
Under the Pennsylvania UCC any construction that enlarges or structurally alters a dwelling requires a permit, and enclosed additions trigger full plan review plus the associated electrical, plumbing, and mechanical work. The UCC is administered locally through a municipal office, a certified third-party agency, or the state. Confirm which one has jurisdiction over your property before starting. Lower Merion requires two sets of plans for a residential addition, and plans must be sealed by a Pennsylvania-licensed architect or engineer when structural alterations are involved. Residential review generally takes about 15 working days. Expansions disturbing over 1,500 square feet of land area may require an engineered plan and a Runoff and Erosion Control Permit from the Planning Division. Verify zoning setbacks, building coverage, and impervious coverage limits for your district before applying. Historic district properties also require HARB review for visible exterior changes.
Documents you may need
- Building permit applicationrequired
- Construction plans and drawingsrequired
- Site plan showing setbacksLikely required
- Structural or engineering detailsSometimes required
- Building permit application with two sets of plansrequired
- Plans sealed by a Pennsylvania-licensed Architect or Professional Engineer (structural work)Likely required
- Impervious Surface Calculations and site planrequired
- Application for Runoff and Erosion Control Permit (land disturbance over 1,500 square feet)Sometimes required
Possible inspections
- Footing and foundation inspection
- Framing and rough-in inspection
- Insulation inspection
- Final inspection
- Framing inspection
Frequently asked questions
- Do I need a permit for addition or structural alteration in Lower Merion?
- Yes. In Pennsylvania, addition or structural alteration generally requires a permit, and Lower Merion is no exception. Under the Pennsylvania UCC any construction that enlarges or structurally alters a dwelling requires a permit, and enclosed additions trigger full plan review plus the associated electrical, plumbing, and mechanical work. The UCC is administered locally through a municipal office, a certified third-party agency, or the state. Confirm which one has jurisdiction over your property before starting. Lower Merion requires two sets of plans for a residential addition, and plans must be sealed by a Pennsylvania-licensed architect or engineer when structural alterations are involved. Residential review generally takes about 15 working days. Expansions disturbing over 1,500 square feet of land area may require an engineered plan and a Runoff and Erosion Control Permit from the Planning Division. Verify zoning setbacks, building coverage, and impervious coverage limits for your district before applying. Historic district properties also require HARB review for visible exterior changes.
- Who issues the permit in Lower Merion?
- The local building department for Lower Merion handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.
- How do I find out the exact requirements for my project?
- Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.
PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.