What Is a Feasibility Study for Energy Code Compliance?

A feasibility study answers the most expensive question in multifamily development: which energy code compliance path actually costs the least for your specific building?

Most developers pick a compliance path based on what their architect or mechanical engineer recommends without comparing alternatives. That single decision can cost $5 to $15 per square foot more than it needs to.

What a Feasibility Study Does

A feasibility study takes your actual building plans and models them against every viable compliance path. It compares the mechanical systems, envelope assemblies, and equipment required for each path, then calculates the total construction cost for each one.

The output is simple: Path A costs this much. Path B costs this much. Path C costs this much. Here is what we recommend and why.

For example, on a recent project we studied, one compliance path required heat pump water heaters in every unit at significant cost. An alternative path used a different mechanical strategy that avoided that requirement entirely while still meeting code. The savings were over $4 per square foot across the building.

Without the feasibility study, the developer would have gone with the first path their mechanical engineer proposed and never known a cheaper option existed.

Why It Matters: The Numbers

Across our 45+ multifamily projects, the average savings from running a feasibility study and optimizing the compliance path is $10.56 per square foot. On a 100,000 square foot building, that is over a million dollars in construction cost savings.

These are not theoretical savings. They come from comparing real compliance paths on real buildings and finding the combination of systems and assemblies that meets code at the lowest total cost.

The savings come from several places:

Mechanical system selection. The difference between ductless mini-splits and ducted central systems can be 6 to 8 HERS points per unit. That gap changes what your envelope needs to do, which changes your insulation costs, your window specs, and your air sealing requirements.

Envelope optimization. Sometimes adding slightly more insulation in one area allows you to use less expensive windows. Sometimes the opposite is true. The feasibility study finds the optimal balance.

Incentive capture. Different compliance paths qualify for different incentive amounts. The net cost after incentives can flip the ranking of which path is cheapest.

What Is Included in ECC's Feasibility Study

Our feasibility study covers:

• Energy modeling of your building using your actual plans and specifications
• Comparison of 3 viable compliance paths
• Cost analysis for each path including mechanical, envelope, and plumbing
• Incentive analysis showing eligible programs and projected amounts for each path
• A clear recommendation with supporting data
• A delivery call where we walk you through the results and answer questions

The study typically takes 2 to 3 weeks from receiving plans to delivery. The output is a detailed report that your team can use to make informed decisions about mechanical and envelope specifications.

When to Get a Feasibility Study

The best time is during schematic design, before your mechanical engineer finalizes the HVAC system and before your architect details the envelope assemblies. At this stage, all options are still on the table and changes are inexpensive.

The worst time is after construction documents are complete. By then, your systems are spec'd, your permits may be submitted, and changing course means redesign costs and schedule delays.

If your project is somewhere in between, it is still worth doing. We have found savings even on projects where CDs were nearly complete, because the modeling often reveals that small specification changes (different water heater, different window U-value) can shift you to a cheaper compliance path without a full redesign.

The Study Is Free

We offer the feasibility study at no cost. There is no catch. We do this because the data sells itself. Developers who see the numbers and the savings almost always want us to handle the compliance work. The study demonstrates exactly what we do and why it matters.

If you are building multifamily in Massachusetts and have not run a feasibility study, you are making compliance path decisions without data.