Accessory dwelling unit services — Philadelphia, PA

Considering an accessory dwelling unit for your Philadelphia home? It's a smart way to add value and functional space, particularly in a historic city like Philadelphia with its diverse housing types. You'll want to understand Philadelphia's zoning code regarding ADUs, which has specific guidelines for different areas. The licensed, insured pros we work with are well-versed in these local requirements. They can guide you through the entire process, from initial design and permitting to final construction, ensuring everything meets city standards. Whether you're envisioning a basement apartment or a backyard cottage, the potential is there. The cost will vary based on the size, complexity, and any specific site conditions in Philadelphia. Call now for a free estimate. These skilled professionals have assisted homeowners across Philadelphia, from Fishtown to Chestnut Hill. You'll receive clear, practical advice tailored to your specific property and vision. Don't let the thought of navigating city rules deter you from this valuable addition. Same-day appointments are often available in Philadelphia. One quick call gets you a free quote — no obligation.

What affects the price

Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.

About this service

These services cover the end-to-end process of adding a secondary home to your property. This includes initial zoning checks, architectural design, permit filing, and final construction. You need these services when you want to create a separate living space for family, guests, or as a rental unit, but don’t want to manage the complex legal and structural requirements on your own.

Frequently asked in Philadelphia

Also serving nearby: Trenton · Allentown · Reading · Elizabeth · Newark

All cities in Pennsylvania →

More on this: HUD ADU resources — ADU policy and financing research.

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Service area details

Serving all of Philadelphia — population 1,550,542; about 11,540 residents per square mile across 134.4 sq mi. ZIP codes covered include 19019, 19092, 19093, 19099, 19101, 19102, 19103, 19104.

Neighborhoods served in Philadelphia: Fishtown, Old City, South Philly, Rittenhouse Square, Germantown, West Philly — and every surrounding area.