Soffit & Fascia Cost Calculator
Price the underside of the overhang and the board at the eave from your overhang width, eave run and fascia length — the siding trim that wraps the roof edge, not the gutter itself.
Soffit (280 sq ft) and fascia (140 lf) is about $1,848.00. Soffit is the underside of the overhang, fascia is the board at the eave — they wrap the roof edge and are part of the siding trim; the GUTTER itself is a separate trade (guttercalcs).
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Soffit is the horizontal underside of the roof overhang; fascia is the vertical board that caps the ends of the rafters at the eave. Together they wrap the roof edge and finish the siding — and they are priced two different ways. Soffit is an area (the overhang width times the length of the eaves), so it is billed by the square foot. Fascia is a run along the eave and the rakes, so it is billed by the linear foot. This estimator adds the two and closes them over a contingency.
One boundary worth stating: this is the siding trim, not the gutter. The gutter and downspouts that hang on the fascia are a separate trade — price those with a gutter tool, not here.
Formula
An area cost plus a linear cost, closed over a contingency:
soffit_area = overhang_width × eave_run
total = (soffit_area × price_per_sqft + fascia_lf × price_per_lf) × (1 + contingency)
The soffit area assumes a roughly rectangular overhang of constant width; a wrap-around or a boxed return adds area at the corners, so measure the real run. Fascia linear feet include both the eaves and the sloped rake edges where your soffit and fascia detail continues — those rake runs are longer than their horizontal projection because they follow the roof slope.
Worked example
A 2 ft overhang around 140 ft of eaves, soffit at $3.00/sq ft, 140 lf of fascia at $6.00/lf, and a 10% contingency:
- Soffit area: 2 × 140 = 280 sq ft
- Soffit cost: 280 × $3.00 = $840
- Fascia cost: 140 × $6.00 = $840
- Total: ($840 + $840) × 1.10 = $1,848
Here soffit and fascia happen to cost the same before the buffer; on a deep overhang the soffit area dominates, on a simple eave the fascia run does.
Measure the run, not the footprint
The common error is measuring the building footprint instead of the actual trim runs:
- Overhang width. Measure from the wall face to the back of the fascia, not to the roof edge; a 12 in, 16 in or 24 in overhang changes the soffit area proportionally.
- Rake runs. Gable rakes follow the roof slope and are longer than they look from the ground — include them in the fascia linear feet if your detail wraps the gable ends.
- Ventilation and returns. Vented soffit panels, boxed eave returns and corner miters all add material; carry them in the contingency or a slightly higher unit price.
This is a planning estimate from your numbers. Confirm panel coverage with the manufacturer and get itemized written quotes from licensed, insured contractors; the gutter itself is a separate trade.
Reference table
What you are pricing, and how each part is billed:
| Part | Where it is | Billed by |
|---|---|---|
| Soffit | Underside of the overhang | Square foot (width × run) |
| Fascia | Board at the eave and rake | Linear foot |
| Gutter | Hangs on the fascia | Separate trade — not here |
Typical overhangs run about 12–24 in; a 2 ft overhang on 140 ft of eave is 280 sq ft of soffit.
Frequently asked questions
How much does soffit and fascia cost?
It is your soffit area times your $/sq ft, plus your fascia linear feet times your $/lf, times a contingency. In the example a 2 ft overhang on 140 ft of eave with 140 lf of fascia is about $1,848. Enter your own quoted rates.
What is the difference between soffit and fascia?
Soffit is the horizontal panel under the roof overhang; fascia is the vertical board that caps the rafter ends at the eave. Soffit is priced by area, fascia by the linear foot. Both are siding trim — the gutter that mounts on the fascia is a separate job.
How do I measure soffit area?
Multiply the overhang width (wall face to fascia) by the total eave run: soffit_area = overhang_width × eave_run. A 2 ft overhang around 140 ft of eaves is 2 × 140 = 280 sq ft. Add area at boxed returns and wrap-around corners.
Is the gutter included?
No. This tool prices the soffit and fascia — the siding trim that finishes the roof edge. The gutter and downspouts are a separate trade and are not estimated here.