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What to Know Before Buying a Historic Townhouse in Philadelphia

5/28/20262 min read

close-up photography of brown wooden card catalog
close-up photography of brown wooden card catalog

Philadelphia's historic townhouses are among the most compelling residential properties anywhere on the East Coast. The craftsmanship, the scale, the architectural detail, the sense of permanence: these are things that no new construction can replicate, no matter how skilled the builder or generous the budget. But buying a historic property requires a different level of diligence than buying a standard home. Here is what I tell buyers before they go under contract.

Start with the masonry. Philadelphia's rowhouse tradition is built on brick, and that brick behaves differently than modern construction materials. Look for signs of water intrusion at the party walls, check the condition of lintels above windows and doors, and look carefully at the mortar. A general home inspector can tell you a lot, but for a high value historic property I strongly recommend bringing in a structural engineer as well. It is not expensive relative to the purchase price and it can save you from a very costly surprise.

Pay real attention to the mechanicals. Many historic homes have been updated in phases over decades, which means you often find HVAC, electrical and plumbing systems at different ages and in varying condition. Something that functions fine today may be near the end of its useful life. Understanding what has been updated and when is essential to projecting your true cost of ownership over the first several years.

If the property carries a historic designation, review what that means for your plans. Philadelphia's Historical Commission oversees changes to designated properties, particularly exterior modifications. If you intend to renovate significantly, understanding those constraints before you are under contract is critical. Some buyers are surprised by how specific the review process can be.

Finally, recognize the value of what you are acquiring when the original details are intact. Period floors, marble mantels, plaster ceiling work, original millwork: these things cannot be faithfully reproduced and they add genuine value. When they are present and in good condition, the premium over comparable modern construction is usually justified.

Buying historic in Philadelphia is one of the most rewarding decisions you can make. Just make sure you go in with clear eyes.

Questions about the market or ready to get started? Reach out for a straightforward conversation.