Debunking the Costs of Energy Code Compliance in Massachusetts: Design and Preconstruction (Part 1)

New Massachusetts energy and carbon requirements don’t automatically drive major first-cost increases in multifamily projects. Most cost impacts are tied to design choices, timing, and market conditions—not the code itself. Early pathway selection, coordinated design, and proper cost attribution are the biggest factors in controlling cost risk.

Across Massachusetts, project teams are hearing more claims that new energy code, embodied carbon, and carbon-reporting requirements will automatically add extraordinary first costs to multifamily projects.

The concern is understandable. Housing projects are already under pressure from land carry, interest rates, labor markets, utility coordination, entitlement pacing, procurement risk, and inclusionary housing obligations.

But that is exactly why the cost story needs to be cleaner.

This first post in a two-part series focuses on the design and preconstruction phase, where many cost claims are formed before a project ever starts construction.

The goal is not to dismiss first-cost pressure; it’s to separate actual code deltas from baseline code compliance, project design choices, pro forma constraints, and timing risk. If every challenge in the pro forma gets folded into a single claim that ‘the Specialized Code costs millions,’ teams lose the ability to identify what is actually driving cost and what can be managed.

Start with the pathway, not the punchline.

One source of confusion is that ‘the code’ is often discussed as if it were a single prescriptive checklist.

In Massachusetts, the available compliance path depends on building type, size, municipality, and whether the project is subject to the Base Code, Stretch Code, or Opt-in Specialized Code. Massachusetts’ energy-code framework is rooted in the 2021 IECC with state amendments, while Stretch and Specialized Code provisions add layers intended to align construction with state energy and greenhouse-gas goals. See Massachusetts Building Energy Code and SWA’s Massachusetts Stretch and Specialized Code quick guide.

That pathway choice matters. SWA has explored several broad routes for commercial and many multifamily buildings, including Prescriptive, Targeted Performance/TEDI, Relative Performance using ASHRAE 90.1 Appendix G, Passive House certification through PHI or Phius, and HERS/ENERGY STAR Multifamily New Construction where applicable. A project that struggles under one path may have a clearer route under another.

For example, TEDI focuses attention on thermal demand, so building form, window-to-wall ratio, envelope assemblies, thermal bridging, airtightness, ventilation, and heat or energy recovery all matter. SWA’s TEDI vs. HERS and TEDI explainer posts make this point in practical terms: the model is not just a compliance artifact; it is a way of seeing which design inputs are actually driving the result.

This is why blanket cost claims are so often misleading. A compact building with reasonable glazing, coordinated enclosure attachments, and efficient ventilation faces a different compliance challenge than a project with complex massing, high window area, unresolved slab edges, and late mechanical coordination. The code may be the setting, but the design still drives many of the inputs.

“The code” is not one requirement. It’s a set of compliance pathways, and the path a project chooses can significantly shape cost, coordination, and feasibility. Projects that struggle under one pathway may perform more efficiently under another.

Disclosure is not the same as a product mandate.

Embodied carbon is another place where the market conversation can get distorted.

Boston’s amended Article 37 Green Building and Climate Resiliency Guidelines bring operational carbon, resilience, and embodied carbon analysis into development review. Article 37 also includes embodied carbon Life Cycle Assessment reporting for certain large projects, and the City has published LCA reporting instructions for developer teams.

That reporting requirement matters because it puts structure, enclosure, and product data into the conversation earlier and more consistently. But LCA reporting is not the same as telling every project to redesign around one insulation product, one structural system, or one façade assembly.

Good embodied carbon analysis is not a single product swap. It may involve concrete mixes, steel or wood options, insulation GWP, EPD availability, material quantities, enclosure attachments, procurement timing, and whether lower-carbon alternatives can be used without creating durability, moisture, fire, acoustic, warranty, or constructability problems.

Instead of, “What product does the code force us to use?,” the better question is: “where can this specific project reduce carbon without creating unnecessary cost or risk?”

Embodied carbon requirements in Massachusetts focus on disclosure and analysis—not prescribing specific materials or systems. The goal is better decision-making, not a one-size-fits-all product mandate

First-cost pressure is real. That does not make it a Specialized Code premium.

A useful cost review should first ask whether the item being priced is actually an incremental Specialized Code requirement, or whether it is already part of constructing a modern code-compliant building.

Code-compliant insulation, air-barrier continuity, mechanical ventilation, fenestration documentation, commissioning, energy modeling, or field verification should not be casually reassigned to the Specialized Code simply because the project is in a Specialized Code community.

Some of the most expensive ‘code impacts’ are also timing impacts.

If energy modeling, enclosure detailing, thermal-bridge review, MEP coordination, or compliance-path selection happens late, manageable decisions can become redesign costs. That does not make the code irrelevant; it means the cost may be caused by discovering the implications too late.

Land carry, financing carry, entitlement pacing, appeals, procurement delays, utility service coordination, and local review processes can also add substantial cost before a building starts construction. Those costs are real, but they should not be laundered into a single line item called Specialized Code.

Inclusionary zoning is another example. In Boston, Inclusionary Zoning applies to market-rate residential developments with seven or more units and requires a share of income-restricted housing. Developers are not wrong when they say an income-restricted unit can cost roughly the same to build as a market-rate unit. The difference is often on the revenue side: restricted rents or sales prices can require cross-subsidy, additional subsidy, lower land basis, reduced return expectations, or other funding sources to close the gap.

That is a serious housing-finance issue. But it is not an energy-code construction-cost premium. If a pro forma blends inclusionary zoning revenue constraints with envelope performance, electrification, solar readiness, Passive House, HERS, or LCA reporting, the team loses the ability to solve the right problem.

Not every cost associated with a Specialized Code project is a Specialized Code requirement. Many items are already part of constructing a modern code-compliant building.

Gross first cost is not the full cost story.

A serious cost conversation should also account for incentives, financing tools, and long-term operating exposure.

Mass Save currently offers Passive House incentives and technical assistance for qualifying multifamily projects, including support tied to feasibility, energy modeling, pre-certification, and certification. Those incentives do not erase every first-cost challenge, but they can materially change the net-cost conversation if they are integrated early enough.

Financing matters as well. PACE Massachusetts, administered by MassDevelopment in consultation with DOER, can help eligible commercial, industrial, and multifamily properties finance energy improvements through a voluntary betterment assessment. MassDevelopment has also announced that new construction is eligible for PACE Massachusetts for qualifying energy efficiency and renewable energy projects. For some projects, that can change how teams think about the capital stack, repayment term, and ownership strategy.

The practical point is not that every incentive or financing tool solves every gap. Eligibility, municipal opt-in status, mortgage-holder consent, timing, ownership strategy, savings tests, and lender requirements all matter. The point is narrower and more important: a serious analysis should evaluate gross first cost, net cost after incentives, financing structure, and long-term operating exposure together.

A meaningful cost analysis must account for incentives, financing tools, and long-term operating exposure—not just upfront construction cost.

Before calling it a code premium, ask for the receipts.

Before accepting a major cost claim tied to Massachusetts code compliance, ask five questions:

• Would this item be required under the Base Code, 2021 IECC practice, or standard multifamily construction anyway?
• Is the cost driven by design choices such as massing, window-to-wall ratio, balconies, cladding attachment strategy, thermal bridges, ventilation approach, or system selection?
• Is it a timing cost caused by late modeling, late MEP coordination, late enclosure detailing, late procurement, or late pathway selection?
• Is it a market or pro forma cost, such as labor, escalation, land carry, financing, entitlement pacing, utility coordination, or inclusionary zoning revenue constraints?
• What is the actual code delta, and what exact requirement, baseline, proposed alternate, and cost assumption support it?

If the answer is not clear, the number is not yet a conclusion. It is a claim that needs to be tested.

The bottom line for the design phase: first-cost pressure is real, but cost attribution has to be precise. Some costs belong to code. Some belong to design. Some belong to the market. Some belong to housing finance. The earlier the project team separates those categories, the better chance it has of making performance predictable, financeable, and buildable. #MathOverMyth #ShowMeThe Data

What this means for developers and project teams:

• Early decisions matter more than code selection
• Design choices drive cost more than compliance pathway
• Incentives and financing must be evaluated alongside first costs

Lookout for part two covering the construction and delivery phases—coming soon!

Need help pressure-testing a Massachusetts code compliance, embodied carbon, or first-cost claim before construction? SWA can help owners, developers, and design teams evaluate Stretch Code, Specialized Code, Passive House, TEDI, HERS, BERDO, Article 37, incentives, and financing assumptions early enough to make informed design and budget decisions. Contact us.

Author: Stephen Moore, Building Systems Director at SWA