How We Calculate Home Improvement Costs
Every cost range on Handy Work comes from a blend of four sources: published market data, aggregated contractor quotes, permit + material pricing trackers, and editorial review. Numbers are refreshed on a rolling basis and reviewed quarterly.
What Each Cost Range Includes
Unless explicitly noted otherwise, every dollar figure on Handy Work is an installed price — the all-in total a homeowner would pay a licensed contractor for the work. That means we include:
- Materials (mid-grade unless specified)
- Labor (licensed contractor rates, not handyman/DIY)
- Equipment and disposal of old materials
- Standard permit fees where applicable
- Reasonable workmanship warranty
We do not include taxes, financing costs, non-standard upgrades, structural repairs revealed mid-job, or HOA-specific aesthetic requirements.
Where the Numbers Come From
Published market data
National and regional pricing from industry reports (BLS PPI for construction inputs, RSMeans construction-cost index, NAHB Cost Code data, manufacturer MSRP catalogs).
Aggregated contractor quotes
Anonymized installed-price quotes from licensed contractors in our verified network, filtered for outliers and weighted by region.
Permit + material pricing trackers
Local permit fee schedules pulled from municipal databases; live wholesale material prices (asphalt, copper, lumber, etc.) updated quarterly from supplier indexes.
Editorial review
Every cost range is reviewed by our editorial team against quoted ranges in the previous 90 days, with adjustments for inflation and material-cost swings.
How We Adjust for Your City
Every city in our database has a cost-of-living multiplier applied to the national base range. A multiplier of 1.0 = national average; 1.3 = 30% above national average; 0.85 = 15% below.
These multipliers reflect local labor rates, permit fees, material delivery costs, and regional demand. They're derived from BLS regional wage data + our quote aggregate, recalibrated quarterly.
Example: A roof that costs $8,750 nationally on average would be approximately $11,375 in San Francisco (1.3×) and $7,438 in Detroit (0.85×). The exact multiplier for your city shows on each cost-guide page when you visit from that city's IP, or via the city-specific URL.
Update Cadence
| Data | Cadence |
|---|---|
| National base ranges | Reviewed quarterly; adjusted on major market moves |
| City cost multipliers | Recalibrated quarterly from BLS regional wage data |
| Material prices | Updated as supplier indexes change (typically monthly) |
| Brand reviews | Reviewed annually; updated for new model releases |
| Articles + guides | Reviewed yearly; rewritten when underlying market data changes meaningfully |
See a Number That Looks Off?
If a price range on any cost guide doesn't match what contractors are quoting in your area, tell us. We review every correction submission and update the underlying data when it checks out.
Submit a Correction →