Deck Staining Cost (2026): Price Per Sq Ft, Prep and a 20×20 Example

Deck staining is a job where the visible work — applying stain — is usually the smallest part of the real labor. Prep and sanding drive most of the cost, and pricing that accurately is what separates a profitable deck job from one that eats your weekend for nothing.

How much does it cost to stain a 20x20 deck?

That's 400 square feet, and the real cost driver isn't the stain itself but the deck's condition — a deck with old, peeling stain or weathered, graying wood needs significant sanding and prep before new stain goes on, while a newer or well-maintained deck needs much less. Price per square foot from your real labor time for prep plus a separate material cost for stain, rather than a flat number that assumes every deck starts in the same condition.

What goes into prepping a deck for stain?

A real deck staining estimate accounts for:

• Sanding. Removing old, peeling stain and smoothing weathered wood — often the single biggest time cost on an older deck.
• Cleaning. Pressure washing to remove dirt, mildew, and loose debris before sanding or staining.
• Repairs. Loose boards, popped nails, or damaged railing sections should be priced as their own line, not assumed into the base staining quote.
• Stain and coats. Material cost by coverage, plus labor for however many coats the wood and stain type need.

How much should you pay someone to stain your deck?

Rather than quoting a flat per-square-foot rate for every deck, price condition into the number upfront — a customer with an older, neglected deck should expect to pay more than one with a newer deck needing a simple refresh coat. Being upfront about why the price differs (prep time, not just square footage) builds trust and avoids disputes when the bid comes in higher than they expected from an online estimate.

How much does it cost to stain a larger deck?

A 1,600-square-foot deck scales the same per-square-foot logic as a smaller one, but total cost climbs enough that customers often want a detailed breakdown before approving it — showing prep, sanding, and stain as separate line items on a larger job makes the total easier to accept than one large lump-sum number.

Quote deck jobs faster

Deck condition — peeling stain, graying wood, damaged boards — and square footage are usually clear from a handful of photos. Fast Snap Pro lets a customer send photos through a link and get back a price built from your own deck staining rates, so you can respond to a lead fast instead of scheduling a visit for every quote request.

Typical deck staining prices

Professional deck staining commonly runs about $2 to $5 per square foot of deck surface, with heavily weathered decks that need stripping or sanding at the high end or beyond. Railings and stairs are often priced separately by linear foot or per step, since they take far more time per square foot than flat boards.

Price by condition tier

Condition	Prep needed	Pricing approach
Refresh: stained recently, little wear	Clean and brighten	Low per-sq-ft tier
Weathered: gray wood, faded stain	Wash, brighten, light sanding	Middle tier
Failed: peeling film-forming stain	Strip, wash, sand heavily	High tier or hourly prep

Example: 20 × 20 ft deck, weathered condition

Line item	How it's priced	Example
Wash and brighten deck surface (400 sq ft)	Per sq ft	$300
Light sanding of rough boards	Hours × rate	$240
Stain deck surface, one coat (400 sq ft)	Per sq ft	$520
Railings (48 linear ft)	Per linear ft	$360
Stairs (5 steps)	Per step	$125
Stain and supplies	Gallons + markup	$165
Replace 3 damaged boards	Per board	$135
Total		$1,845

Illustrative numbers only. Use your own rates, production times and local costs.

Choosing the stain type

Transparent and semi-transparent stains soak in and are easier to recoat, but need recoating more often. Solid stains hide more and last longer on older wood, but can peel and are harder to strip later. Explain the trade-off on the quote and note the expected recoat interval. It sets expectations and sets up repeat work.

Frequently asked questions

How much does it cost to stain a 20×20 deck?

A 400 sq ft deck often runs roughly $800 to $2,000 for the deck surface, depending on condition and prep, with railings and stairs extra.

How often should a deck be stained?

Every two to four years is common, depending on stain type, sun exposure and foot traffic.

How long after washing can a deck be stained?

The wood needs to dry first, often a day or two depending on weather. Follow the stain manufacturer's guidance.