Building permits, zoning and septic rules in Prince George's County, Maryland

Yes. Prince George's County requires the owner or authorized agent to obtain the necessary permit before construction, enlargement, alteration, repair, movement, demolition, an occupancy change, or regulated electrical, gas, mechanical or plumbing work begins¹. Limited exemptions include painting, exterior siding, roof-shingle replacement without structural repair, exact window or door replacement without structural alteration, and certain small projects identified by the county¹. Prince George's County adopted a current list of building codes and standards effective March 1, 2026, with additional codes potentially applying to the scope of work⁹. A project that needs a commercial building, site-road development or homeowner permit also needs an inspection¹⁰.

The Prince George's County Department of Permitting, Inspections and Enforcement (DPIE) is the building-permit office; call 301-636-2000 or visit 9400 Peppercorn Place, Largo, MD 20774¹¹. Building Plan Review is available at 301-636-2070, Inspections at 301-636-2080, and Enforcement at 301-883-6168¹¹. The Prince George's County Planning Department handles zoning, use, subdivision and site-plan approvals that must precede a building or site permit; call 240-545-8976^4,12. For zoning enforcement on existing private property, call the Zoning Compliance / Enforcement Division at 301-636-2090¹³. A business outside the City of Laurel also needs a Use and Occupancy Certificate before operations begin, and that certificate does not itself authorize construction¹⁴.

Yes. Prince George's County has a zoning ordinance, while the City of Laurel has its own zoning authority^2,3. The Planning Department reviews zoning, use, subdivision, site plans and plats before DPIE issues building or site permits, while the Zoning Compliance / Enforcement Division handles compliance on developed property^4,13. Parcel zoning matters for unconventional housing: manufactured homes are prohibited in many zones and generally require special-exception review where allowed⁸. We could not confirm a countywide minimum dwelling size; ask the Planning Department about the parcel's exact district¹². In an RR conservation subdivision, the minimum net lot area is 10,000 square feet, at least 50% of the gross tract must remain conservation area, and the basic main-building yards are 20 feet in front, 5 feet at the side and 20 feet at the rear¹⁵. RR conservation-subdivision lots from 10,000 through 19,999 square feet may cover no more than 30% of net lot area; larger lots are generally capped at 25%¹⁶. Road edges and adjoining agricultural conservation land can trigger much deeper yards, so verify the recorded plat before siting a house¹⁵.

The Prince George's County Health Department or DPIE Health approves and administers on-site sewage disposal systems⁴. When public sewer is unavailable, a new residence or commercial building must start with a percolation-test application; satisfactory results are followed by a sewage-disposal-permit application, and the building permit waits for the septic permit and any applicable well permit⁵. Some soils can be tested only during the wet season from February 1 through April 30, with dates subject to rainfall¹⁷. The completed sewage disposal system must be inspected before it is covered, and a satisfactory inspection produces a Certificate of Compliance⁵. The county also issues permits for replacement of failing septic systems and conventional systems for new construction¹⁸. County-permitted individual sewage disposal is the documented off-grid sanitation option where public sewer is unavailable⁵. Only about 1.9% of county soils lack severe limits for a conventional drain field, so make the site evaluation a purchase contingency¹⁹.

The service path depends on the parcel: projects inside the water and sewer envelope need Category 3 to advance toward public service and WSSC permits for new lines; projects outside need Category 6 plus DPIE well and septic permits²⁰.

We could not confirm that Prince George's County allows long-term RV living or a tiny home as a distinct use on an individual private lot; ask the Planning Department about the parcel and proposed dwelling classification¹². Habitation in an RV, camper, mobile home or trailer on public property or a public right-of-way is prohibited unless the location is a designated public campground, recreational park or licensed mobile-home park⁷. That public-space rule does not answer whether an RV may be occupied on a private lot. Temporary trailer camping is separately addressed in county-regulated recreational campgrounds: the campground needs special-exception approval, at least 5 acres and designated campsites, and a trailer may be occupied for no more than 3 months in any 12-month period²¹. A manufactured home used as a detached house is allowed only where the zoning table permits it and must meet siting, anchoring and appearance standards⁸.

1. Ask the Planning Department to confirm zoning, proposed use and whether subdivision or a recorded plat must be approved before construction^12,22.
2. Determine the parcel's water and sewer category: public service inside the envelope follows the Category 3 and WSSC path, while well and septic outside it require Category 6 and DPIE permits²⁰.
3. If public sewer is unavailable, complete percolation testing and obtain the county sewage-disposal permit⁵.
4. If public water is unavailable, have the well driller apply for the well permit; the county also performs construction checks and requires satisfactory water samples before issuing a Certificate of Potability⁵.
5. Apply to DPIE for the building permit and budget for applicable building, grading, planning and technology fees^11,23.
6. An owner acting as contractor must obtain the Homeowner Waiver and accept its deed, work and occupancy conditions⁶.
7. Schedule building inspections and have the completed septic system inspected before it is covered^5,10.

Confirm the water and sewer category before buying: projects inside the service envelope need Category 3 to advance toward public water and sewer, while projects outside need Category 6 and county well and septic permits²⁰. Make septic feasibility a purchase contingency because only about 1.9% of county soils lack severe limits for a conventional drain field¹⁹. Confirm that the parcel is a recorded buildable lot; a landowner or developer generally needs an approved subdivision plan and compliant record plat before construction²². Check floodplain status and whether construction affects wetlands or waterways, because floodplain development and some wetland work require additional permits^24,25. A new or modified driveway within a state right-of-way needs an MDOT State Highway Administration permit²⁶. A farm building on farm property used only for agriculture may be exempt from the building permit, but electrical and mechanical trade permits and other land approvals can still apply¹⁰.