During our inspections, we often get asked about the cost to replace an old central air conditioning system. So, I contacted 2 HVAC contractors (T.F. O’Brien – Heating & Air Conditioning and Perillo Brothers) about the average cost in a typical house such as a four-bedroom 2 bath colonial. Because there are so many variables, the range of potential costs is large, i.e., how sophisticated and efficient do you want the system to be, does it need new ductwork or smart thermostats, does it require complicated work in a difficult to access attic, are the electrical connections adequate, 1 zone or 2 zones?
All in all, a safe ballpark range is $7,000 to $16,000
Our policy is not to quote prices in our inspections, rather, our advice is to get a licensed and qualified contractor to evaluate and price the job. As a disclaimer, we have no financial interests with any contractors at all, period.
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