Siding guide
Siding DIY vs contractor cost
Compare siding squares, trim allowances, and installation ranges before replacing exterior siding.
Reviewed · May 9, 2026Start with the calculator
Use the calculator first so the DIY and contractor comparison starts from the same project size and assumptions.
When DIY can make sense
- Small detached wall or shed
- Simple single-story access
- Minimal trim
- No sheathing damage
When a contractor can make sense
- Whole-house siding
- Two-story work
- Fiber cement or wood siding
- Water damage or flashing concerns
How to decide
- DIY can work for small, simple siding sections where water details are visible and manageable.
- Contractors become easier to justify when access, flashing, trim, or hidden damage drive risk.
- Make sure bids separate siding, wrap, trim, removal, repair allowances, and paint or caulk scope.
Worked example
160 linear ft perimeter with 9 ft walls.
Siding quantity
13.9 squares
1,386 sq ft order area including 10% waste
DIY material total
$3,717–$11,088
Siding, housewrap, trim, starter, and fastener allowance
Contractor total
$6,741–$18,018
Materials plus labor
Starter shopping list
- vinyl siding 13.9 squares
- Housewrap, starter strips, corners, trim, fasteners Allowance included
- Caulk and flashing tape As needed
This example is generated from the same calculator logic used on the Siding calculator page.
Cost factors to compare
- Siding material
- Openings and trim
- Wall height
- Removal scope
- Sheathing and moisture repair
Contractor quote checklist
- Siding material and profile listed
- Housewrap and flashing included
- Trim package clear
- Removal and disposal listed
- Sheathing repair pricing clear
Common mistakes
- Ignoring gables and corners
- Forgetting water-resistive barrier
- Comparing quotes with different trim scopes
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