Energy audits are one of those services that sound great in theory but are easy to skip. Here's an honest look at what you actually get, what it costs, and when it genuinely pays off.
What a professional energy audit includes
A full audit (blower door test and thermal imaging): $300-$600. A basic audit (visual inspection and review of utility bills): $100-$250. The blower door test pressurizes the home and measures air leakage -- giving you a specific number (ACH50) that quantifies how drafty your home is. Thermal imaging identifies specific cold spots, insulation gaps, and thermal bridges.
What the audit tells you
After a full audit, you'll know: exactly where your home is losing air (often behind outlets, around recessed lights, at the top plate of exterior walls), how your insulation compares to code requirements, whether your HVAC ducts are leaking, and a prioritized list of improvements with estimated payback periods.
When an audit is worth it
Worth it if: your energy bills are high for your home size and climate, you've noticed drafts but can't locate them, you're planning major upgrades and want to prioritize correctly, or you're buying an older home (1950s-1980s) and want to understand efficiency baseline.
Free audit alternatives
Many utilities offer free or discounted energy audits -- check your utility's website before paying for one. Some states offer subsidized audits through weatherization programs. The Inflation Reduction Act also provides a 30% tax credit for energy audits (up to $150) when combined with weatherization improvements.
Bottom line
A full energy audit at $300-$600 is worth it for homes with high energy bills or before a major renovation. The utility-provided free version is a reasonable starting point if it's available in your area.
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