How much does it cost to replaster a 10,000 gallon pool?

The same way: by the square foot of interior, at HomeGuide's $6 to $8 for standard plaster. A smaller pool has less wall and floor, so the bill is lower, but the rate does not change with the gallon count. Measure it and use the calculator.

How much does it cost to replaster a 30,000 gallon pool?

A pool that size has more surface than a 15,000-gallon pool, and HomeGuide's rate of $6 to $8 per square foot applies to all of it. HomeAdvisor's by-dimension table tops out at a 20-by-40-foot pool at $5,200 for the finish alone; anything larger is a custom measurement.

Does pool depth change the replaster price?

Yes, because depth is wall area. Two pools with the same footprint and different depths have different surface areas, and HomeGuide's price is per square foot of surface. That is also why two 15,000-gallon pools can get different quotes.

Is the refill priced by the gallon?

That is the one line that is. HomeAdvisor publishes about $55 per 5,000 gallons for a refill; HomeGuide's repair guide prices filling at $30 to $100 per 1,000 gallons, and its resurfacing guide puts a hose refill at $40 to $400 and a delivery truck at $400 to $2,000.

How much does it cost to replaster a 15,000 gallon pool?

Published August 21, 2026

Replastering is priced by surface area, not gallons: HomeGuide publishes $6 to $8 per square foot of interior, or $6,000 to $8,000 for 1,000 square feet.

That is the honest answer to a question phrased in the wrong unit, and it applies to 10,000-gallon, 18,000-gallon and 30,000-gallon pools alike. A plasterer covers walls and floor with a coat of a set thickness — SGM, which makes the Diamond Brite quartz finish, specifies 3/8 to 1/2 inch and publishes coverage per bag in square feet, not gallons. Two pools holding 15,000 gallons can have different surface areas, because a deep, narrow pool and a shallow, wide one do not share walls. Gallons tell you the water bill; square feet tell you the plaster bill.

Sources: HomeGuide, SGM (Diamond Brite manufacturer)

The published rate, by finish

Finish	Per square foot	Published lifespan
Standard plaster	$6 – $8	7 – 12 years
Quartz plaster	$7 – $10	10 – 15 years
Pebble	$7 – $15	15 – 20+ years

HomeGuide's per-square-foot resurfacing prices for the plaster-family finishes. Multiply by your pool's interior surface, not its gallons.

Source: HomeGuide

Angi reads plaster slightly lower at $5 to $6 per square foot, and HomeAdvisor prices it at $5,500 per 1,000 square feet. The three guides overlap, and none of them publishes a gallon rate — which is itself the answer to why the quotes you get will not be quoted per gallon either.

Sources: Angi, HomeAdvisor

How to get from 15,000 gallons to a real number

Measure the pool's length and width, and its shallow-end and deep-end depths.
The floor is roughly length times width. The walls are roughly the perimeter times the average depth. Add them — that is the surface a plasterer covers.
Multiply that area by the published rate for the finish you want, from the table above.
Add the drain, the prep and the refill, which are separate lines on every published guide.

The calculator on this site does that arithmetic and shows the gallons next to the square feet, so you can check that the dimensions match the pool you know: the pool resurfacing cost calculator.

The by-dimension table two guides publish

HomeAdvisor and Angi both publish a resurfacing cost by pool dimensions rather than gallons: $3,328 to $3,400 for a 16-by-32-foot pool, $4,212 to $4,200 for 18-by-36 and $5,200 for 20-by-40, with smaller pools scaling down. Read those as finish-only figures for a simple shape, and notice that they land under HomeGuide's per-square-foot bands applied to a pool with walls. Printing both is the honest move; averaging them would invent a number nobody published.

Sources: HomeAdvisor, Angi, HomeGuide

A contractor who quotes your pool off its gallon count has not measured it. Ask for the square footage on the quote.

What the replaster line leaves out

HomeGuide prices draining and cleaning at $600 to $650 and the refill at $40 to $400 by hose or $400 to $2,000 by truck. HomeAdvisor reads the drain at $175 to $225 plus about $250 for cleaning, the refill at around $55 per 5,000 gallons, and surface repairs before plastering at $200 to $1,200 or more. For a 15,000-gallon pool, the refill is the one line where the gallon count finally matters.

Sources: HomeGuide, HomeAdvisor

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Questions people ask next

How much does it cost to replaster a 10,000 gallon pool?: The same way: by the square foot of interior, at HomeGuide's $6 to $8 for standard plaster. A smaller pool has less wall and floor, so the bill is lower, but the rate does not change with the gallon count. Measure it and use the calculator.
How much does it cost to replaster a 30,000 gallon pool?: A pool that size has more surface than a 15,000-gallon pool, and HomeGuide's rate of $6 to $8 per square foot applies to all of it. HomeAdvisor's by-dimension table tops out at a 20-by-40-foot pool at $5,200 for the finish alone; anything larger is a custom measurement.
Does pool depth change the replaster price?: Yes, because depth is wall area. Two pools with the same footprint and different depths have different surface areas, and HomeGuide's price is per square foot of surface. That is also why two 15,000-gallon pools can get different quotes.
Is the refill priced by the gallon?: That is the one line that is. HomeAdvisor publishes about $55 per 5,000 gallons for a refill; HomeGuide's repair guide prices filling at $30 to $100 per 1,000 gallons, and its resurfacing guide puts a hose refill at $40 to $400 and a delivery truck at $400 to $2,000.

Written for homeowners by Most Recommended Pool Resurfacing, which measures which pool resurfacing companies AI assistants actually recommend in 12 U.S. metros. Nobody can pay to be on those lists. How we measure.