OUTDOOR LIVING
How Much Does Deck Sealing Cost?
Estimate wood deck sealing and staining cost per square foot — with the free calculator.
Sealing a wood deck protects it from water, UV and wear — and doubles its life. The cost depends on the deck size and finish. This guide covers the cost per square foot and a calculator.
THE SHORT ANSWER
The short answer
Professional deck sealing costs $0.50–$3 per sq ft in labor; staining runs $1–$2.50 per sq ft. A typical 350 sq ft deck costs $300–$700 to stain and seal.
What it costs
Sealer material runs $0.20-$0.80 per sq ft. Labor runs $0.50-$3 per sq ft for sealing, $1-$2.50 for staining. A 350 sq ft deck lands between $300-$700 total.
- Sealer material: $0.20–$0.80 per sq ft
- Sealing labor: $0.50–$3 per sq ft
- Staining labor: $1–$2.50 per sq ft
- Typical 350 sq ft deck: $300–$700
Sealer vs stain
Sealer protects against water and UV with a clear or light tint. Stain adds color and protection. For old gray decks, a tinted sealer restores color without a full sanding.
What affects the price
Prep work — power washing, drying and light sanding — is the hidden cost. Older decks need more sanding. Railings and stairs add surface area. Two coats cost more than one.
Try the calculator with your deck
Enter the deck area, sealer price per sq ft and labor per sq ft to see the total.