Home addition quote comparison worksheet
Use this worksheet to compare home addition bids against the same scope, assumptions, and project conditions.
Planning range $30,000 - $180,000 per project Use the range as context, then compare each bid line by line.
Keep every bid on the same assumptions
Start with the same project description, cost drivers, expected materials, access notes, and timeline for each contractor. The biggest drivers for this project are addition area, addition type, build direction, and foundation and site work.
Scope comparison
| Assumption | Question to ask | Bid 1 notes | Bid 2 notes | Bid 3 notes |
|---|---|---|---|---|
| Project scope | What is included in each home addition bid, and what would be billed separately? | |||
| Addition area | How does each contractor account for addition area? | |||
| Addition type | How does each contractor account for addition type? | |||
| Build direction | How does each contractor account for build direction? | |||
| Foundation and site work | How does each contractor account for foundation and site work? |
Bid terms to compare
| Bid item | What to compare | Bid 1 notes | Bid 2 notes | Bid 3 notes |
|---|---|---|---|---|
| Included work | Labor, standard materials, preparation, cleanup, and disposal included in the price. | |||
| Allowances and exclusions | Items priced as allowances, excluded work, or conditions that could change the final price. | |||
| Permits and code work | Permit handling, inspection requirements, code upgrades, and who pays for surprises. | |||
| Schedule and payment terms | Start date, timeline, deposit, progress payments, final payment, and cancellation terms. | |||
| Warranty and cleanup | Labor warranty, material warranty, site protection, cleanup, and haul-off responsibilities. |
Before you choose a contractor
Ask each contractor to price the same scope, materials, cleanup, warranty, and change-order rules. A low bid is only useful when you know what is included and what can change later.