Ballpark Lab

Siding Cost Calculator / Montana

Montana siding estimate

Siding Cost in Montana (2026)

Compare a consistent house and installation scope before customizing. The Montana regional model factor is 0.98× and adjusts the modeled subtotal; it is not a measured local labor rate. Price inputs last updated July 6, 2026.

A two-story vinyl siding scenario in Montana

45 × 30 ft footprint (150 ft perimeter), 19 ft walls, gable roof, 12 windows, 2 doors, 1 garage door, no tear-off. These are also the calculator's initial settings, not measured averages of local homes.

$10k – $41k
Input completenesshigh

Based on the model's answered input checks, including defaults. This is not verified price accuracy or a statistical confidence level.

Material takeoff

Siding to order
32 squares
Starter strip
150 lf
Housewrap
3,075 sq ft
Outside corner posts
76 lf
Vinyl boxes (2 squares/box)
17 boxes

Cost breakdown

vinyl siding (installed)
$10k – $39k
Permit allowance
$100 – $400
Total
$10k – $41k
Model estimate
$24,172
  • Wall area = footprint perimeter × 19 ft grade-to-eave height; a 1.5:1 rectangle is assumed when only the perimeter is known.
  • 2 gable triangles estimated at a 6/12 pitch for the "gable" roof style.
  • Openings reduced at 75% of their area (trim and cuts eat part of the saving); waste factor 13%.
  • Re-siding typically needs a building permit in Montana; HOAs and historic districts may review material and color, and rotted sheathing found at tear-off is the classic change order. Hail exposure pushes many homeowners toward impact-resistant fiber cement.

Installed-price bands and regional factors are planning inputs. The model includes a generic permit allowance but excludes hidden rot, replacement sheathing, structural repairs and hazardous-materials work. See data provenance and limitations and the calculation method.

Regional planning notes for Montana

Montana siding is a dry-cold problem: rot is rare in the arid air, but hail is a genuine regional hazard and deep-winter cold embrittles bargain vinyl. Fiber cement and engineered wood suit the climate and the mountain aesthetic both. Wind-driven snow tests fastening and flashing on exposed sites. Labor sits just below the national average, though crew scarcity outside the handful of population centers can stretch timelines more than price.

Estimate your siding in Montana

House details

This estimates wall area from your footprint — we adjust for stories, gables, windows and doors.

The long side of the house, in feet.

The short side, in feet.

Footprint perimeter: 150 ft (2 × (length + width))

Grade to eave, in feet — pre-filled from the story count.

Gable ends add sided triangles; hip and flat roofs don't.

Openings to subtract
Windows
12
Doors
2
Garage doors
1

Trim and cuts eat part of the saving — most estimators don't subtract 100%.

Estimated total
$10,375–$41,499
Vinyl · 32.3 squares
Low $10kMost likely ~$24,172High $41k

$10k – $41k · $7 per square foot (/sq ft) · 32.3 siding squares (1 square = 100 sq ft)

Input completenesshigh

Based on the model's answered input checks, including defaults. This is not verified price accuracy or a statistical confidence level.

Material takeoff

Siding to order
32 squares
Starter strip
150 lf
Housewrap
3,075 sq ft
Outside corner posts
76 lf
Vinyl boxes (2 squares/box)
17 boxes

Cost breakdown

vinyl siding (installed)
$10k – $39k
Permit allowance
$100 – $400
Total
$10k – $41k
Model estimate
$24,172
  • Wall area = footprint perimeter × 19 ft grade-to-eave height; a 1.5:1 rectangle is assumed when only the perimeter is known.
  • 2 gable triangles estimated at a 6/12 pitch for the "gable" roof style.
  • Openings reduced at 75% of their area (trim and cuts eat part of the saving); waste factor 13%.
  • Re-siding typically needs a building permit in Montana; HOAs and historic districts may review material and color, and rotted sheathing found at tear-off is the classic change order. Hail exposure pushes many homeowners toward impact-resistant fiber cement.

Compare materials

VinylSelected
$10k – $41k
Fiber cement
$17k – $48k
Engineered wood
$21k – $52k
Wood
$24k – $59k

The same house in each material — same size, openings, site, and state.

iBallpark estimate for planning, not a bid. Wall area is estimated from your footprint — a contractor will measure each wall. Excludes hidden rot, sheathing replacement, and structural repairs found at tear-off. Get 3 local quotes before signing.

Site data & assumptions: U.S. EIA · OpenEI URDB · Google Solar · NREL PVWatts · DSIRE · IRS · ENERGY STAR · Ballpark Lab model assumptions — see all sources

Frequently asked questions

How much does siding cost in Montana?
The two-story reference house (45 × 30 ft footprint, about 32.3 squares to order) has a modeled vinyl range of $10k – $41k before tear-off. This is a planning model, not a local bid survey.
How does fiber cement compare with vinyl in Montana?
For the same reference house, the model gives $17k – $48k for fiber cement versus $10k – $41k for vinyl. Compare product specifications, installation details and a contractor's written scope; price alone does not determine suitability.
Do I need a permit to re-side a house in Montana?
Confirm requirements with the municipality responsible for your address, including any historic-district or design review. The estimate contains a generic permit allowance, not a determination of approval or an official fee.

Siding costs in other states