Pool Renovation Cost Calculator

Include Replaster produces the largest swing of any single ON/OFF decision at this calculator's defaults -- toggling it off removes both the plaster line item (about 45% of the default total) and drops the drain/prep fee from $800 to $300. But that's a toggle capped between "off" and "on," so across each input's full working range it isn't the biggest driver of Total Renovation Cost overall: Pool Length alone spans roughly $23,000 of swing from its smallest to largest declared value, over four times the replaster toggle's full $5,225 span, because pool dimensions compound into every scalable line item (plaster, tile, and coping all move together) rather than switching a fixed set of them on or off. Replastering is still consistently the single largest cost component of a typical renovation in this calculator, larger than tile, coping, or equipment individually, when it's included at all.

Plaster Type looks inert to a small nudge around its default because it's a coded 1-3 input (1 = marcite, 2 = quartz, 3 = pebble) and a small fractional change rounds right back to the same integer -- but its real effect is large: at the default pool size, switching from marcite ($5/sq ft) to pebble ($11/sq ft) more than doubles the replaster line item alone, adding over $5,000 to the total. Pool Length, Pool Width, and Average Depth all feed into total interior surface area (floor plus wall area), which in turn scales the replaster, tile, and coping costs together -- so a change to any one dimension moves several cost line items at once, not just one. Include Waterline Tile and Include Coping toggle their own cost line items on and off directly; Include Equipment adds a flat $4,500 regardless of pool size when enabled, and is the only scope toggle whose cost doesn't scale with pool dimensions at all.