Pros - Checking the Work

   Your local building department will inspect work that requires a permit, but don't rely solely on the people there to ensure good work. Check periodically to see that your plans and specifications are being followed. Make sure that dimensions and locations are correct, especially before forms are built and concrete is poured. If you requested receipts for materials, check purchases against specs.
   If the contractor wants to change your plan, ask for an explanation. If you discover you made a mistake, discuss remedies with your contractor. A change may involve extra cost, requiring an addendum to your contract.
   Try to evaluate the situation before work begins. If the workers don't explain things or answer questions, halt the work until you get satisfactory responses.