COST CALCULATOR

How Much Does It Cost To Install A Window Sill?

Typical range: $225-$347

Find out how much your project will cost

cost to install a window sill Calculator

For your project in zip code 20149 with these options, the cost to install a window sill starts at $73.09-$112.69 per sill. Your actual price will depend on job size, conditions, finish options you choose.

Often used as a shelf for plants or other decorations, a window sill is part of the trim area at the bottom of the window where the wall and window meet. It helps to prevent drafts and moisture from getting into the home. Installing a window sill isn't overly difficult, but it's a project that most homeowners leave to professionals.

Cost Calculator
Calculations are dependent on where you live
Sills

Standard ServicesQuantityLowHigh
What you can expect
Range per sill:$74.96$115.58
Range for this type of project:$225$347
Estimate: $286
Window Sill Cost
3
sills
$5$7
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Cost of finger-jointed pine window sill, 1-1/4"x6-5/8", primed and ready to paint.
Window Sill Labor, Basic
2
hours
$155$251
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Labor cost, under typical conditions, for complete installation. Apron will be measured, trimmed, and finished. Edge gap will be caulked, and nail holes patched and smoothed. Fee is inclusive of all aspects of the project, such as thorough planning, acquisition of equipment and material, preparation and protection of project site, and meticulous cleanup.
Window Sill Job Supplies
3
sills
$1$1
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Requisite supplies for the job, including fasteners, connectors, and materials for surface preparation and finishing.
Window Sill Equipment Allowance
1
job
$65$88
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Daily rental of specialty equipment for maximum quality and efficiency. These include pneumatic-finish nailer, 12" compound miter saw, biscuit joiner, and detail sander. Consumable equipment elements not included.
Standard services
Window Sill Cost
$5 -$7
arrow_drop_down
3
sills
Cost of finger-jointed pine window sill, 1-1/4"x6-5/8", primed and ready to paint.
Window Sill Labor, Basic
$155 -$251
arrow_drop_down
2
hours
Labor cost, under typical conditions, for complete installation. Apron will be measured, trimmed, and finished. Edge gap will be caulked, and nail holes patched and smoothed. Fee is inclusive of all aspects of the project, such as thorough planning, acquisition of equipment and material, preparation and protection of project site, and meticulous cleanup.
Window Sill Job Supplies
$1 -$1
arrow_drop_down
3
sills
Requisite supplies for the job, including fasteners, connectors, and materials for surface preparation and finishing.
Window Sill Equipment Allowance
$65 -$88
arrow_drop_down
1
job
Daily rental of specialty equipment for maximum quality and efficiency. These include pneumatic-finish nailer, 12" compound miter saw, biscuit joiner, and detail sander. Consumable equipment elements not included.
Optional Services
What you can expect
Range per sill:
$75 - $116
Range for this type of project:
$225 - $347
Estimate:
$286
Cost Comparison
YOUR ESTIMATE
$286

NATIONAL AVERAGE RANGE
$221 -$341
YOUR ESTIMATE

Install a Window Sill national average cost

The national average materials cost to install a window sill is $1.86 per sill, with a range between $1.49 to $2.24. The total price for labor and materials per sill is $74.25, coming in between $57.80 to $90.70. A typical 6 sill project costs $445.51, with a range of $346.81 to $544.21. Your actual price will depend on your location, job size, conditions and finish options you choose.
cost to install a window sill
National Avg. Materials Cost per sill$1.86
National Avg. Cost (labor and materials) for 6 sill$445.51
National Cost Range (labor and materials) for 6 sill$346.81 - $544.21

Preparing to Install

To add a sill to an existing window, the horizontal area is cleared of siding, Sheetrock or other surface material and is stripped clean down to the frame itself. The window and its framework are not disturbed, but the flat area in front of it is completely bared.

Cost Factors

There are several factors that can affect the cost of the project. If an existing sill needs to be removed or if the frame beneath the window requires repair, this can add to the final price. The cost of the various types of wood can vary greatly as well. If the sill is primarily for aesthetic appeal, a highly decorative wood may be selected. If it's to be used for potted plants or other heavy items, a more rugged wood known for its strength might be better. The type of finish and the amount of sanding or priming necessary will also play into the costs.

Professional Results

The sill and apron add beauty and functionality to a window, and their appearance is worth investing in a professional. A trim and woodworking specialist has the knowledge and tools to ensure homeowners receive the best results.

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