The number one way to get installation costs down is to perform comprehensive research on window installation companies, narrow them down to three, and choose from the best among them in terms of price and value.  You can also try to lower costs by getting competitive bidding from your three final choices, seeing if they will budge on pricing to get your business. Another way to reduce installation costs is to try to take advantage of coupons you may receive in local mailers or on a company’s website.  One final way to save on installation costs is to see if a company will allow you to supply your own windows. They may be cheaper than the ones they supply, and as a result, you may only be responsible for installation charges and other costs associated with installation, including hidden costs.