Methodology
Transparent planning assumptions, not fake precision.
Contractor Quote Checker benchmarks assumptions against public home-improvement cost guides and market-context sources, then keeps ranges broad enough for quote review.
Quote review packet
Before-signing checklist
- 01 Build a rough rangeEstimate
- 02 Check scope and line itemsAudit
- 03 Compare assumptionsNormalize
- 04 Ask better questionsClarify
Results stay educational and client-side. No login, no lead form, no guaranteed price.
Visual guide
How source-benchmarked assumptions become a planning range
The calculators start with source-benchmarked assumptions, then let users adjust quantity, material tier, labor difficulty, and complexity. The result is a planning range to compare against written contractor quotes.
Built around written contractor quotes
How the calculators use sources
Each calculator starts with low, typical, and high planning assumptions for a unit such as square foot, linear foot, window, system, or project. We benchmark assumptions against public home-improvement cost guides and market-context sources, then reconcile those benchmarks with scope notes, line-item risks, and the calculator unit.
The calculators do not copy one source as if it controls the answer. When sources disagree, the planning range stays broad and the calculator page explains the source limitations.
What source-benchmarked means
Source-benchmarked means a calculator assumption has been compared with public benchmark ranges from named sources. It does not mean the number is a verified price, guaranteed price, contractor quote, local bid, or professional estimating database result.
What the calculators do not know
The calculators do not inspect the property, measure hidden conditions, select products, check code requirements, price a contractor's schedule, or know the final written scope. They also do not use RSMeans, Xactimate, live contractor data, or proprietary professional estimating data.
Why local quotes can differ
Contractor quotes can differ because of access, labor availability, product selections, demolition, disposal, permits, warranty, weather, hidden damage, project timing, contractor overhead, and risk. The best validation is still getting multiple written contractor quotes for the same scope.
Why ranges are intentionally broad
A narrow range would imply confidence the site does not have. Broad ranges are more honest for early quote review because they leave room for materials, labor difficulty, complexity, and missing line items.
How often data should be reviewed
Source benchmarks should be reviewed before major content updates, after meaningful market changes, and at least periodically as public cost guides update. Each source-backed calculator displays its last reviewed date.
Source benchmark table by calculator
| Calculator | Status | Confidence | Last reviewed | Benchmark summary |
|---|---|---|---|---|
| Roof Replacement Cost | source-benchmarked | medium | 2026-05-20 | Public roof guides show asphalt-shingle installed costs around $3 to $5 per square foot and installed asphalt shingle squares around $200 to $700, while broader replacement costs can rise with material, pitch, removal, decking, and flashing scope. |
| Water Heater Replacement Cost | source-benchmarked | medium | 2026-05-20 | Public guides cluster tank-style replacements in the hundreds to low thousands, with tankless and code or venting changes pushing higher. |
| Fence Installation Cost | source-benchmarked | medium | 2026-05-20 | Wood and vinyl benchmarks commonly fall around $20 to $60 per linear foot, while replacement, height, gates, terrain, and composite or metal materials can push higher. |
| House Painting Cost | source-benchmarked | medium | 2026-05-20 | Sources show exterior painting often starts near low single-digit dollars per square foot, while prep, stories, trim, repairs, and paint line can widen the range. |
| Flooring Installation Cost | source-benchmarked | medium | 2026-05-20 | Public flooring benchmarks range from low-cost vinyl and laminate to hardwood, with demo, subfloor prep, stairs, transitions, and trim widening quote totals. |
| Window Replacement Cost | source-benchmarked | medium | 2026-05-20 | Public window guides commonly show wide per-window spread because insert versus full-frame installation, frame material, glass package, trim, and quantity matter. |
| HVAC Replacement Cost | source-benchmarked | medium | 2026-05-20 | Public HVAC benchmarks show basic replacements in the mid four to low five figures, with ductwork, efficiency, system type, and conversion work widening the high side. |
| Deck Building Cost | source-benchmarked | medium | 2026-05-20 | Public deck ranges often start around $25 to $50 per square foot for new decks, while composite decking, stairs, railing, height, footings, and demolition can widen totals. |
| Bathroom Remodel Cost | source-benchmarked | medium | 2026-05-20 | Public bathroom remodel guides show small updates in lower ranges and full or primary bath remodels widening significantly with tile, layout, waterproofing, fixtures, and hidden damage. |
| Kitchen Remodel Cost | source-benchmarked | medium | 2026-05-20 | Public kitchen remodel guides cluster many professional remodels in the mid five figures, with complete layout changes, cabinets, appliances, counters, and electrical or plumbing scope widening the high end. |
| Mini Split Installation Cost | source-benchmarked | medium | 2026-05-20 | Public mini-split benchmarks show smaller single-zone systems in low-to-mid thousands, while garage prep, wiring, BTU size, mounting location, and multi-zone systems can push higher. |
| Basement Finishing Cost | source-benchmarked | medium | 2026-05-20 | Public basement finishing benchmarks often start around $30 to $50 per square foot for basic finishes, with bathrooms, egress, moisture work, electrical, HVAC, and room count widening totals. |
| Garage Door Replacement Cost | source-benchmarked | medium | 2026-05-20 | Public garage door replacement ranges vary widely by door size, insulation, material, opener, tracks, springs, and labor inclusion. |
| Driveway Replacement Cost | source-benchmarked | medium | 2026-05-20 | Public driveway guides show replacement ranges around mid single digits to low double digits per square foot for many materials, with concrete, pavers, removal, base prep, drainage, thickness, and access widening totals. |
| Siding Replacement Cost | source-benchmarked | medium | 2026-05-20 | Public siding guides commonly show installed siding in the mid single digits to low teens per square foot, while removal, house wrap, flashing, trim, sheathing repairs, multiple stories, and premium materials can push project quotes higher. |
| Attic Insulation Cost | source-benchmarked | medium | 2026-05-20 | Public attic insulation benchmarks show blown-in and batt projects often in low single-digit dollars per square foot, with spray foam, old insulation removal, air sealing, ventilation work, fixture damming, and cleanup widening the high side. |
Market context and material-price volatility
Market context sources help explain why pricing can move over time. They are not project estimates and do not replace contractor quotes.
- FRED Building Material and Supplies Dealers PPI (opens in new tab): Producer Price Index series used only as market context for building-material and supply pricing movement over time.
- Producer Price Index News Release (opens in new tab): PPI release used as broad market context for materials, energy, services, and trade price movement.
Professional limitations
Contractor Quote Checker provides educational planning tools only. It does not provide contractor, legal, financial, insurance, real estate, tax, engineering, inspection, appraisal, or professional advice. Use the calculators to prepare better questions, then verify the actual scope with qualified professionals before hiring or spending money.