When Is a Permit Required?
- Attached to the house (ledger board connection)
- Over 200 square feet in area
- More than 30 inches above grade at any point
- Within setback zones or easements
Exception: Freestanding, ground-level decks under 200 sqft and under 30 inches may be exempt. We confirm with the county before building.
Permit Process (Step by Step)
- Prepare plans: Site plan showing property lines, setbacks, and deck footprint. Structural drawings with footing sizes, beam/joist specs, ledger details. Material specifications.
- Submit to PW County Development Services: Online or in-person submission. Include all required documents.
- Zoning review: County checks setback compliance, lot coverage limits, and easement conflicts. PW County is generally faster than Fairfax for this step.
- Building review: Structural review ensures code compliance footing depth (below frost line), beam sizing, ledger connection, railing height.
- Permit issuance: Once approved, permit must be posted at the job site.
- Three inspections: Footing (before concrete), Framing (before decking), Final (complete structure).
PW County vs Fairfax County Permit Comparison
| Factor | Prince William County | Fairfax County |
|---|---|---|
| Plan review time | 2–4 weeks | 3–6 weeks |
| Permit cost | $150–$500 | $200–$600 |
| Online submission | Yes | Yes |
| Inspections | 3 (same) | 3 (same) |
| Typical setback (rear) | 20–25 ft | 25–35 ft |
| HOA complexity | Moderate | Higher (more HOAs) |
Important: Three Jurisdictions in PW Area
The Manassas/Woodbridge area has three separate building departments:
- Prince William County: Covers Woodbridge, Gainesville, Haymarket, Bristow, Lake Ridge, Dale City, Triangle, Nokesville
- City of Manassas: Independent city with its own building department (covers Manassas city limits only)
- City of Manassas Park: Also independent with its own department
Not sure which covers your property? Tell us your address we determine the correct jurisdiction and handle permitting accordingly.
We Handle Everything
Permits are part of our standard scope no extra charge. We prepare plans, submit applications, track review timelines, schedule all inspections, and resolve any reviewer comments. You don't deal with the county at all.
FAQ
Do I need a permit?
Yes if attached to house, over 200 sqft, or over 30" above grade.
How long?
2-4 weeks faster than Fairfax County.
How much?
$150-$500 depending on project. Included in our estimate.
Which jurisdiction am I in?
PW County, City of Manassas, or Manassas Park. We determine and handle the correct one.