Estimating siding labor comes down to four moves: takeoff the quantities, pick a crew, apply a production rate, and convert the hours to a burdened labor cost. The part that bites estimators is the production rate, because productivity swings with material type, wall height, exposure, and detail. Use ranges built from your own past jobs, not a single number pulled from a table.
What You Are Counting
Siding labor is not one task. Break the takeoff into the actual work pieces before you pick any rate. For a typical residential scope you are counting squares of siding, square feet of soffit, linear feet of fascia and trim, linear feet of starter strip and J channel, and number of corners and openings. Each carries its own production rate, so lumping them all into one number is how jobs go sideways.
- Siding, measured in squares (100 SF each), split by material. Vinyl, fiber cement, wood, and metal all have their own rates.
- Soffit, measured in SF, including vented and non vented runs.
- Fascia and trim, measured in LF, including rake, frieze, and corner boards.
- Starter strip, J channel, and utility trim, measured in LF, usually bundled into the install but a separate rate for trim heavy jobs.
- Corners and openings, counted in EA, because wrapping a corner or flashing a window is its own unit, not part of the square.
If the scope includes demolition of existing siding, count that separately. Tear off, haul off, and sheathing repair have their own production rate and their own crew, usually a laborer pair. House wrap, flashing, and rain screen furring also run on their own SF lines before the siding goes on.
Crew and Production Rate
A common siding crew is three workers for vinyl, two to three for fiber cement, and a carpenter heavy crew for wood and metal. On large production jobs a four person crew with one cutting and three laying is common. Pick the crew first, because the production rate is expressed in man hours per unit for that crew size, not per individual.
Production for siding is typically tracked as man hours per square for the field, man hours per LF for trim and soffit, and man hours per EA for corners and window wraps. Expect a wide band. A straightforward single story gable with vinyl runs fast. Fiber cement with hidden fasteners, a two story wall with scaffolding, or cedar shingles with exposure lines all take several times longer per square. RSMeans and similar references publish ranges by material, but treat any published number as a starting point and adjust it to your crew and conditions.
Apply productivity factors on top of the base rate. Wall height and access are the biggest movers: anything over one story usually needs scaffolding or a ladder jack setup, which cuts the effective rate. Steep gables, dormers, and turrets add layout and cut time. Cold weather affects fiber cement handling and vinyl brittleness. A learning curve applies if the crew is new to a material or a fastener system.
Step by Step Labor Estimate
Run the math in a consistent order so you can check it against past bids. The order below works for almost any siding scope.
- Takeoff: list field squares by material, soffit SF, trim LF, starter and J channel LF, and corners and openings EA separately.
- Crew: pick the crew size and composition for each material. Three workers is the default for vinyl.
- Rate: assign a man hour per unit rate for each line. Use a low and high number.
- Hours: multiply quantity by rate to get labor hours for each line. Add them for total hours.
- Burden: add labor burden, typically 30 to 45 percent on top of the bare wage, covering taxes, workers comp, insurance, and benefits.
- Cost: multiply burdened hours by the wage rate. That is your direct labor cost.
- Add mobilization, layout, cleanup, and punch list hours. These are real hours, usually 5 to 10 percent of install hours.
For a representative scope of a 2,400 SF house with 24 squares of vinyl and 220 LF of soffit, a typical crew might land around 60 labor hours for install plus layout and cleanup. At a burdened wage in the $28 to $55 range, that lands near $1,680 to $3,300 in direct labor cost. The siding labor rate before burden often runs $20 to $40 per hour depending on region, material, and union versus open shop. Always confirm against your actual burdened labor cost, not a published average.
Factors That Move the Number
Material type is the single biggest factor. Vinyl is the fastest common siding. Fiber cement with exposed nails is slower, and fiber cement with hidden fasteners is slower still. Cedar shingles and shakes run at a fraction of the vinyl rate because of layout, exposure lines, and staining. Stucco and metal panel systems are their own trades with their own crews.
Wall height and geometry change everything. A single story simple rectangle runs fast. A two story house with dormers, gables, and turrets runs several times longer per square because of layout, cutting, and access. Scaffolding, ladder jacks, and boom lifts add hours and equipment cost. Corners and openings are the slowest units in siding: a wrapped outside corner or a window with J channel and flashing can take 20 to 40 minutes each depending on detail.
Do not forget the prep side if it is in your scope. House wrap, flashing tape, rain screen furring, and sheathing repair are SF or LF lines with their own rates. Estimators who fold prep into the field square rate routinely underbid old house re siding.
Common Mistakes
- Using one blended production number across materials. Vinyl and fiber cement are different trades with different rates.
- Forgetting mobilization, layout, cleanup, and punch list hours. These alone can be 10 percent of install.
- Not burdening the labor rate. Bare wage is not your cost. Add taxes, insurance, benefits, and overhead.
- Ignoring height and access. Scaffolding and ladders cut the effective rate.
- Underestimating corners and openings. They are EA units, not part of the square.
- Skipping prep. House wrap, flashing, and sheathing repair happen before the siding and have their own rate.
Putting It Together
Build a one page worksheet for each siding scope. List the materials, the squares, the SF and LF, the corners and openings, the crew, the low and high production rate, the resulting low and high labor hours, and the burdened labor cost. Compare the total to two or three past jobs of similar type. If the new number is more than 15 percent off a comparable job, find out why before you bid. Production rates are not opinions, they are records. Use your own records first, published ranges second, and a single point estimate never.