Siding Replacement Cost Calculator
Replacing existing siding typically adds removal and disposal costs on top of new material and labor. This calculator is pre-set for a replacement project so those fields are ready to fill in.
Project type
Wall measurements
Enter each wall's length and height in feet and inches. Wall area = length × height.
Gable ends
No gables added. Gable area = base × rise ÷ 2.
Windows & doors
No openings added. Each opening's area is subtracted from your gross siding area.
Siding material
Waste factor
Waste accounts for cuts at corners and openings, gable angles, damaged pieces, and pattern matching. 10% is a common starting point for a simple rectangular home; complex roof lines or diagonal cuts often need more.
Trim & accessories
Actual accessory requirements vary by installation method and manufacturer — use these as a starting checklist, not a final order.
08Cost estimateOptional
Applied to area including waste — what you'll actually buy.
Applied to net wall area — what installers actually cover, before waste.
Enter your own prices for the most accurate estimate for your area. Leave fields blank or at 0 to exclude them.
Preview
Estimated siding needed
Net area
—
Waste added
—
Total area (w/ waste)
—
Siding squares
—
Vinyl units
—
Est. total cost
—
How we calculated this
Trim & accessories
Want professional installation?
Bring this estimate to local siding contractors when comparing quotes, or reach out with questions.
Contact usHow it's calculated
- 1. Material cost = required new-siding area × your material price.
- 2. Labor cost = net area × your labor price, if included.
- 3. Subtotal = material + labor + removal + disposal + house wrap + trim.
- 4. Estimated total = subtotal + contingency percentage.
Worked example
A 1,500 sq ft replacement project with $300 removal and $200 disposal, on top of $4.50/sq ft material and $2.50/sq ft labor:
| Material + labor subtotal | $11,175 |
| Removal | +$300 |
| Disposal | +$200 |
| Subtotal | $11,675 |
| Estimated total (5% contingency) | $12,259 |
Removal and disposal costs vary by how much old siding must come off, disposal fees in your area, and whether sheathing repair is needed.
Assumptions
- • Removal and disposal costs are user-entered — they depend heavily on the condition and type of existing siding.
- • This estimate doesn’t include hidden repairs (rotted sheathing, water damage) that are sometimes discovered once old siding is removed.
- • Permit fees, if required in your area, are not included by default — add them under "Trim & accessories" cost if applicable.
Tips
- • Ask your contractor whether their quote assumes any sheathing repair is included or billed separately.
- • Budget a higher contingency (10%+) for replacement projects, since hidden damage is more common than with new construction.
What a replacement job includes that a new-build job doesn’t
Replacement work starts with tear-off. Crews strip the old siding, sort and haul the debris, and inspect the wall underneath before anything new goes on. That is why removal and disposal show up as their own lines: the amount of debris depends on the material you’re removing, its condition and how many layers are on the wall.
Age matters for safety as well as cost. Cement-based shingle siding manufactured before about 1980 commonly contains asbestos, and homes built before 1978 may have lead paint under or on the siding. If your house is that old, have the material tested by a qualified lab before it’s disturbed, and hire crews trained and licensed for asbestos or lead work if the results come back positive. This affects both the price and the schedule.
The other surprise is what’s behind the siding. Once the old cladding is off, crews sometimes find rotted sheathing, damaged framing or missing flashing. Fixing those adds cost and change orders, and it’s why replacement projects call for a bigger contingency than new construction. Ask each contractor how they price repairs found after tear-off: per sheet of sheathing, per hour, or by written change order. The bidding guide explains how contractors build those allowances.
Finally, check local permit rules. Some areas require a permit for re-siding, and some require the wall to be re-wrapped or re-flashed to current code when the siding comes off. Use the house wrap calculator to size the weather barrier if the wall is being re-wrapped.
This is a planning estimate
Frequently asked questions
How much does it cost to replace siding?
Replacement typically costs more than new construction siding because of added removal and disposal — enter your own measurements and prices above for a project-specific estimate.
What’s the difference between this and the general cost calculator?
This calculator starts with "Siding replacement" and "Remove existing siding" pre-selected, so removal and disposal cost fields are visible by default.
Does this calculator account for hidden sheathing damage?
No — hidden damage found after removing old siding is a common source of change orders and isn’t predictable from measurements alone. Budget a contingency for this possibility.
Can I install new siding over old siding?
Sometimes, but it hides moisture damage and can complicate flashing and trim depths. Many contractors prefer tear-off; check local code and your product’s installation guide.
Why do replacement quotes come with an allowance for repairs?
Contractors can’t see rot or framing damage until the old siding is off, so many quotes include an allowance or a per-unit price for those repairs.
Related calculators
Siding Calculator
The full walls, gables, openings, waste, material, and cost calculator for any siding project.
Siding Cost Calculator
Estimate material, labor, removal, and total project cost for a siding job.
Vinyl Siding Calculator
Estimate vinyl siding cartons, squares, and cost for your home.
House Wrap Calculator
Estimate house wrap rolls needed to cover your exterior walls.
Related guides
How to Measure a House for Siding
Walls, gables, openings and trim, step by step.
How Much Does Siding Cost?
Typical installed prices and what moves a quote.
How to Estimate and Bid a Siding Job
Take-off, waste, materials, labor, removal and profit.
Siding Cost Per Square
Pricing by the 100 sq ft unit and how to convert quotes.