The lowest bid is not automatically the cheapest project, and the highest bid is not automatically the best one. Before comparing prices, make sure the contractors are actually pricing the same job.
Put the scope side by side
Write down what each contractor says she or he will do. Look for demolition, preparation, installation, finishing, cleanup, disposal, protection of existing surfaces, and anything explicitly excluded. A missing task can make one estimate look cheaper until it becomes a change order later.
Compare materials and allowances
One bid may specify a product and model while another uses a broad allowance. Note brand, grade, quantity, finish, warranty, and allowance amounts. If selections have not been made, ask what happens when the actual product costs more or less than the allowance.
Separate fixed prices from unknowns
Identify items that cannot be priced until walls are opened, equipment is diagnosed, or concealed conditions are known. Ask how those discoveries will be documented, priced, and approved.
Look at timing, not just dollars
Compare expected start dates, project duration, working hours, lead times, and what could delay completion. Ask whether the schedule depends on materials, inspections, subcontractors, or other projects.
Compare payment terms
Understand deposits, progress payments, final payment, and what milestone triggers each one. Avoid making assumptions from percentages alone. The contract should explain what you are paying for and when.
Check responsibility
Who handles permits when required? Who schedules inspections? Who protects the home, removes debris, coordinates subcontractors, and repairs damage? Who is responsible for patching or painting after access work? These details have real costs.
Verify the business, not just the proposal
Check licensing when required, insurance, references, complaint history where available, and the exact business name on the contract. Requirements differ by jurisdiction, so use the appropriate state and local sources.
Ask every bidder the same unanswered questions
Once you see the gaps, send the same clarification questions to each contractor. Your goal is to make the proposals more comparable before deciding, not to force every contractor into the same format.
Good to know: the useful question is not, Which number is lowest? It is, What am I actually getting for this number, what is still unknown, and who is responsible when something changes?
General educational information only. Contract, licensing, permit, payment, lien, and cancellation requirements vary by jurisdiction and project. Consult appropriate local authorities or legal professionals when needed.