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.