Heated Driveway Cost Calculator
| System | Installed $/sq ft | 400 sq ft total | The trade |
|---|---|---|---|
| Electric, new pour | $10-20 | $4,000-8,000 | simple, uses your electric panel |
| Electric, retrofit | $13-26 | $5,200-10,400 | old slab comes out first |
| Hydronic, new pour | $15-28 | $6,000-11,200 | cheapest to run on gas |
| Hydronic, retrofit | $20-36 | $8,000-14,400 | boiler space and repour |
A heated driveway is a snow-melting system buried in the slab: electric resistance cable or hydronic tubing carrying warm fluid, laid 2-4 inches under the surface and wired or plumbed to a sensor that fires it when moisture meets freezing temperature. Installed cost runs $10-20 per square foot for electric in a new pour and $15-28 for hydronic - and retrofit projects add roughly 30 percent because the old slab comes out first. A standard 400 square foot two-car drive lands between $4,000 and $11,200 depending on the path you pick.
The number nobody puts in the brochure is the running cost, and it is the honest heart of the decision: snow melting draws roughly 30-50 watts per square foot for every hour a storm demands it. Your 400 square foot drive at 35 watts per square foot for a six-hour storm pulls about 84 kWh - call it $14 a storm at average residential rates, or $130-150 over a ten-storm winter. Hydronic shifts the same heat onto gas economics and often halves that in cheap-gas regions.
So the comparison is really this: a $600 plow contract versus a $4,000-11,200 slab that costs $14 a storm and never asks you to be home. The slab does not win on math alone - it wins on mornings, berms, black ice that never forms, and a surface that dries itself, which is a different product than plowing and prices like it.
How to use
- Enter the slab area you actually want snow-free - the drive plus, if the budget survives it, the walkway and the path to the door as separate zones.
- Pick the system: electric cable for simplicity and smaller slabs, hydronic when gas is cheap where you live or the slab is big enough to amortize a boiler.
- Enter your electric rate from the bill - the running math is the number that decides whether this is a luxury or a machine.
- Compare the per-storm result against your plow quote, then read the retrofit column if your driveway already exists: the delta is the demo and repour.
Frequently asked questions
How much does a heated driveway cost per square foot?
Electric cable systems run $10-20 per square foot installed in a new pour; hydronic runs $15-28; retrofits add about 30 percent because the existing slab must be saw-cut or removed and repoured. A 400 square foot driveway therefore lands between roughly $4,000 and $11,200 all-in, with controls and zoning pushing toward the high end. Driveways are the cheap version per foot - walkways and steps cost more because the areas are small and the detail work is dense.
How much electricity does a heated driveway use?
Plan on roughly 30-50 watts per square foot while melting: a 400 square foot drive at 35 W/sq ft draws about 14 kW, so a six-hour storm cycle uses 80-85 kWh - around $14 at the 17-cent national average, $25+ in expensive-electricity states. Automatic moisture and temperature sensors are the real efficiency feature: without them, idle hours quietly double the bill. Hydronic moves the same heat onto a gas boiler and typically cuts running cost 40-60 percent where gas is cheap.
Is a heated driveway worth it vs plowing?
Purely on dollars, no - a $600 seasonal plow contract clears the same drive for a fraction of the electricity, and the slab needs years to break even. What the $14-per-storm math buys instead: you never shovel, plow berms never block the car, black ice never forms, and the pavement dries itself. For shift workers, households with small children, or anyone with a heart-risk history, that trade prices in quickly; for everyone else it is a luxury purchased knowingly.
Can you add a heated driveway to an existing driveway?
Not into it - retrofit means saw-cutting trenches for cable or removing and repouring the slab, which is exactly the 30 percent premium the table shows. The sensible retrofit moments are the ones you were already paying for: a cracked slab due for replacement, new construction, or a full driveway repave. Some electric systems tuck into a 2-inch overlay, which softens but does not eliminate the demo cost.
Do heated driveways damage concrete or fail often?
Done right, no: the cables and tubing are inert, and a properly designed system actually helps the slab by eliminating freeze-thaw salt cycles - that is why municipalities specify it for sidewalks. The real failure mode is installation: a heating fault under concrete is a July problem, which is why the installer's warranty and a pressure test on hydronic loops matter more than the brand of cable. Zones matter too - losing one zone should not darken the whole driveway.