No sign-up · Your figures · Transparent arithmetic
Put two siding bids
on the same page.
Enter real proposal amounts, add the required work each leaves out, and keep a planning reserve separate. Your entries stay in this browser page.
Your comparison
Adjusted known scope
Enter both proposal amounts to compare.
With your planning reserve
Formula: base bid + known required omissions = adjusted known scope. Reserve = adjusted known scope × your percentage.
This compares entered amounts only. It does not establish technical equivalence, a contractor quote, hidden-damage cost or an association assessment.
Before the lower total influences your decision
Confirm the product, quantities, removal, wall repair process, flashings, trim, access, protection and approvals are comparable. A missing detail cannot be repaired by arithmetic. Resolve scope gaps and record the source of each adjustment.
How the hypothetical example works
Proposal A: $180,000 base + $20,000 known omissions = $200,000. Proposal B: $195,000 base + $0 known omissions = $195,000. B is $5,000 lower for that assumed known scope. The example loads a 0% reserve; it is not a local price benchmark or suggested budget.
Read the complete budget methodology and closeout requirements. Condo boards should obtain the appropriate review before approving funding or contracts.