Local Due Diligence Guide · Philadelphia Suburbs

    How Do I Research a Home’s Permit History?

    An added room or finished basement can prompt questions that a listing does not answer. Permit research helps you identify what to ask before relying on improvements. Public records can answer different questions, and one source rarely tells the whole story. A short research plan helps you separate confirmed facts from items that still need a direct answer.

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    Typical timeline: 30 days

    Step-by-Step

    1. 1

      Identify changes worth tracing

      Compare current photos, disclosures, available older listings, and your own observations. Make a list of additions, finished areas, relocated fixtures, or other changes that need explanation. Keep observations neutral: a different layout is a reason to investigate, not proof of unauthorized work. Attach the parcel number so the request follows the correct property. Record the source, the date checked, and any open question in your property notes. If the answer could change your costs or plans, ask the responsible office to confirm it in writing. Do not treat a missing online entry as proof that no issue exists.

    2. 2

      Ask for permits and related outcomes

      Contact the municipal office about available records, including older or archived files. Ask for permit scope, dates, inspections, and any recorded completion status associated with the changes. Find out how to interpret abbreviations or incomplete entries. An issued permit can establish that an application was approved without proving every later step was completed. Record the source, the date checked, and any open question in your property notes. If the answer could change your costs or plans, ask the responsible office to confirm it in writing. Do not treat a missing online entry as proof that no issue exists.

    3. 3

      Resolve gaps with the right people

      Compare the response with seller-provided documents and ask about unmatched work. If records are unavailable, ask staff what other evidence or review might help. Bring material questions to your agent and appropriate professionals before a contract deadline. Do not promise that a future approval is simple, inexpensive, or certain without property-specific review. Record the source, the date checked, and any open question in your property notes. If the answer could change your costs or plans, ask the responsible office to confirm it in writing. Do not treat a missing online entry as proof that no issue exists.

    A Worked Example

    Hypothetical example: A buyer in Havertown notices a finished lower level. The online search shows little information, so the buyer requests archived records and asks about completion status rather than assuming the space is either approved or unauthorized.

    Your Checklist

    • List visible changes
    • Request municipal records
    • Check inspection outcomes
    • Compare seller documents
    • Resolve material gaps

    Common Pitfalls to Avoid

    • Equating issuance with completion
    • Calling missing records proof
    • Assuming later approval is easy

    Common Questions

    Not necessarily. Older records may be stored elsewhere or indexed differently. Ask municipal staff about record coverage and search options before drawing a conclusion from an empty result. Ask the office that maintains the record to explain its scope and any limits. Keep the reply with your notes, and get qualified help if the answer affects a contract, budget, or planned use.

    Not by itself. Ask whether inspections and any required final steps were completed, and request the documents that show the status rather than relying on the permit number alone. Ask the office that maintains the record to explain its scope and any limits. Keep the reply with your notes, and get qualified help if the answer affects a contract, budget, or planned use.

    A receipt may help identify work or a contractor, but it does not establish municipal approval. Use it as a lead when requesting records and clarifying the project history. Ask the office that maintains the record to explain its scope and any limits. Keep the reply with your notes, and get qualified help if the answer affects a contract, budget, or planned use.

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