Real Estate
Utility Cost Estimator (New vs Old Home)
New homes (built 2010+) typically cost 30-50% less to heat and cool than 1970s houses due to better insulation, windows, and HVAC.
Annual utility cost
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- Per sq ft
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- Monthly avg
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- vs new build
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FAQ
Why such a big difference? +
A 1965 ranch has ~R-3 walls and single-pane windows. A 2020 home has R-21 walls and triple-pane. Heat loss is 3-5x lower.
HERS rating? +
Home Energy Rating System. 100 = code-built. 50 = half the energy. 0 = net zero. Lower is better. Worth asking the builder for the rating.