What does a commercial energy audit cost?

The honest ranges

Most consultants won't put numbers in writing. I will, with one caveat up front: these are national estimatesfor what the market charges, not Pathline Foundry's pricing. Every building is different, so the point here is to give you a realistic frame, not a quote.

Overall, a commercial energy audit runs roughly $0.05–$0.50 per square foot, depending on the audit level, building size, and complexity. Broken out by ASHRAE level:

• ASHRAE Level 1 (walk-through): about $0.05–$0.10 per sq ft, or roughly $1,500–$5,000 flat for smaller buildings
• ASHRAE Level 2 (comprehensive): about $0.10–$0.35 per sq ft. This is what most mandatory ordinances and utility incentive programs require
• ASHRAE Level 3 (investment-grade): around $0.50 per sq ft, with detailed hour-by-hour energy modeling

One rule of thumb keeps you grounded: an audit generally shouldn't exceed about 10% of a building's annual utility bills. If a proposal blows past that, ask why.

What actually drives the price

The range is wide because four things move the number, and they compound:

• Building size and square footage: more area means more systems to survey and more data to analyze
• Number and complexity of systems: HVAC, process loads, and building controls each add scope
• Data availability: clean utility history and accessible equipment make the work faster; gaps make it slower
• The audit level and depth of modeling: a walk-through and an hour-by-hour energy model are entirely different amounts of engineering

Which level do you actually need?

Here is the insight that matters more than any per-square-foot number: matching the audit level to the building is the real variable. A cheap Level 1 on a complex building produces a thin report that sits on a shelf and changes nothing. An over-scoped Level 3 on a simple building burns money on modeling precision the decision never needed.

For most owners, the answer is a Level 2. It's comprehensive enough to quantify measures with real costs and paybacks, and it's what most compliance ordinances and utility incentive programs require anyway. Spending up to a Level 3 is a deliberate choice you make when a large capital decision justifies the extra rigor, not a default.

Why the net cost is lower than the sticker

The sticker price is rarely what you pay. In the Pacific Northwest, incentives are designed to push owners toward exactly this kind of analysis, and they can cover a large share of the audit:

• Washington: the Clean Buildings early-adopter incentive pays up to $2.00 per sq ft for measures
• Oregon: ECAPP offers an early-compliance incentive for getting ahead of the deadlines
• Idaho: Idaho Power's detailed assessment reimburses 75% of the audit cost, up to $12,500

That last one is the clearest example: for an eligible Idaho Power customer, a detailed (Level 2) assessment is often nearly free. I cover how that program works, and the custom incentive that pays for the upgrades on top of it, in the Idaho Power incentive guide. For Washington owners, the Clean Buildings 2026 guide walks through the early-adopter incentive and the compliance timeline.

The bottom line

The cheapest audit is the one that actually gets implemented. A report nobody acts on costs its full price and returns nothing; a right-sized audit that captures the available incentives pays for itself and then keeps paying through the savings it unlocks. Matching the scope to the building and lining up the incentives is what makes the spend worthwhile.

That's also why you won't find a price list here: no pricing games, no anchored numbers designed to look like a deal. Every building is different, so every project starts with a conversation about your facility, your goals, and what's actually worth pursuing.