Adu Unit in Philadelphia, PA | AccessoryDwellingUnit Direct

Looking for adu unit in Philadelphia, PA? Call AccessoryDwellingUnit Direct for a contact a provider — no obligation. Licensed adu builders serve Philadelphia and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.

About this service

An ADU, or accessory dwelling unit, is simply a secondary housing unit on the same lot as a primary residence. People look into these units when they need more functional square footage, such as a home office, gym, or guest house. Because designs vary from simple studios to multi-bedroom layouts, the total build budget depends on your specific site constraints and material choices. Exact pricing confirmed free on the call.

Frequently asked in Philadelphia

How much does an ADU typically cost in Philadelphia?

Can I find an ADU builder near me in Philadelphia?

Yes, you can find qualified ADU builders serving every part of Philadelphia. These professionals understand the local building environment. They’ve worked on projects in areas like Chestnut Hill and Roxborough. Don't guess about who to call. We help you find experienced local teams.

What are the basic rules for building an ADU in Philadelphia?

How much does ADU construction cost in Philadelphia?

What ADU services are available in Philadelphia?

We help you access a range of ADU services in Philadelphia. This includes design, permitting, and full construction. Whether it's a detached unit or an attached addition, we find the right specialists. They handle everything from start to finish. Get expert advice on your project today.

How do I get a quote for an ADU in Philadelphia?

What does 'accessory dwelling unit' mean for my Philadelphia home?

An accessory dwelling unit, or ADU, is a secondary living space on your property. It's a separate unit with its own kitchen, bath, and living area. Think of a basement apartment or a backyard cottage. It’s a flexible way to add space. Learn more by calling us.

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

All cities in Pennsylvania →

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

Service area details

1,550,542residents

11,540per sq mile

8ZIP codes served

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, Rittenhouse Square, Old City, West Philadelphia, South Philadelphia, Kensington — and every surrounding area.