Once you’ve selected a contractor and have a cost estimate, get all the details in writing in the form of a contract. Before you sign, make sure this lists:
Read the fine print to make sure all subtrades are covered and listed in the contract. That way, you’ll avoid a nasty surprise when you are faced with a hefty bill from an electrician or plumber on top of the price you thought covered the entire job. The Construction Lien Act allows you to retain 10 per cent of the contract price for 45 days after the work is done to ensure quality – and lasting – work.
Check warranties and guarantees carefully. The contractor’s reputation and length of time in business are important. A "10-year" guarantee is worthless if the contractor goes out of business next month.
If a large amount of money is involved, it is best to have a lawyer go over the contract to advise you of your rights and how the contract operates. Do this before you sign.
You may need a building permit for certain renovations, so check with your city or town hall before signing the contract. It’s your responsibility for getting the building permit. If you want the contractor to get the permit, make sure this is spelled out in the contract and don’t allow construction to begin until you’ve seen the permit.