// Energy modeling with thermal-bridge and certification support for design and construction teams across New York & Massachusetts.
// We turn open design questions into buildable, documented performance targets.
Designing high-performance luxury homes
You own the design. We handle the performance work: energy model, thermal bridges, and certification path. You keep design control and give your client a building with documented targets.
Single-family · Townhouse · Brownstone renovation
Building affordable multifamily at scale
Performance risk belongs in the pro forma early. We model efficiently, right-size the mechanicals, map incentives like Mass Save, stretch-code compliance, and LIHTC points, then prepare documentation your certifier and review team can use.
Affordable housing · Mixed-use · Multifamily
Getting high-performance details right
Your name is on it. We give you blower-door-ready details and right-sized mechanicals you can actually install. The result is fewer callbacks and measured proof of the work.
Single-family homes · Custom builds · Renovations
// Were you sent here by your architect or builder? In plain terms: we're the specialists your team brings in to verify comfort and durability before anyone breaks ground.
We model the whole building from envelope to mechanicals. Design decisions rest on real data instead of assumptions, with right-sized HVAC and a clear path to the performance target before construction locks in.
2D and 3D finite-element modeling finds envelope heat loss, condensation risk, and mold-risk conditions before construction. Every junction is verified against a buildable detail. Filing in NYC? The 2025 energy code now requires psi-value calculations, a service we've delivered for over a decade.
PHIUS and PHI certification works as durability insurance. It catches costly envelope defects a code inspection can miss. We run the model, prepare the documentation, and manage the review. Want the performance without the plaque? We'll hit the targets either way.
Send us your drawings at any stage, from early sketches to full CDs. Earlier involvement gives the team more leverage.
We create a detailed energy model in WUFI Passive or PHPP, including wall assemblies, windows, and mechanical systems.
We walk through the results with your team. Where is performance falling short? Where can we shrink the mechanical system to save money? Real numbers, real options.
You receive a design-phase report with the building's energy performance, open risks, and recommended next moves.
Construction proceeds with a documented performance target. We support certification and can verify the finished building against the model.
What these numbers mean in the building: even room-to-room temperatures and a home that can hold ~70°F for days without power.
One deliverable that de-risks the whole project. Bring us in at concept and you get a design-phase report that turns open questions into a documented performance target. It covers:
CLEAR ENOUGH FOR EVERYONE.
DETAILED ENOUGH FOR AN ENGINEER.
The real test of an energy model is the utility bill after move-in. On our certified projects we track modeled-versus-measured performance and show the receipts.
Modeled heating demand [X kWh/m²a], measured [Y]. Result: within [±Z%] of the model. "[Short, visceral client quote, e.g. I don't wear a sweater in my own house anymore.]"
Certified Phius. Roughly [2-3%] construction premium, with projected operating costs around [40%] of a code-built equivalent.
[One-line result, e.g. resolved thermal bridges brought the worst junctions back above the condensation threshold and cut peak heat loss.]
BLDGTYP builds and maintains Passive House Tools, the open-source toolkit used by Passive House practitioners worldwide. Fifteen years of our talks and tutorials are free in the knowledge library, including thermal bridging, multifamily case studies, Honeybee-PH, AI for Passive House, and a complete 14-part modeling course. When your project needs an answer the textbook doesn't have, we're often the team that wrote the tool or taught the class.
Massachusetts has become one of the most active Passive House markets in the country. The state's opt-in Specialized Stretch Energy Code recognizes Phius and PHI certification as a compliance pathway for new construction. The Mass Save Passive House Incentive Program funds the work from feasibility study through certification. We support MA architects and developers across both phases from our new Massachusetts office.
The Massachusetts Municipal Opt-in Specialized Stretch Energy Code (225 CMR 22 Appendix RC for residential, 225 CMR 23 Appendix CC for commercial) names Passive House, through Phius or PHI certification, as one of its published compliance pathways for new construction. Adoption is municipality-by-municipality and continues to expand each Town Meeting cycle.
For multifamily new construction with five or more units in a Mass Save sponsor's service territory, the Passive House Incentive Program funds feasibility studies, pre-construction energy modeling, pre-certification, and per-unit certification incentives. Program eligibility requires a Passive House consultant certified through PHI or Phius. Refer to the program page for current incentive amounts.
BLDGTYP is certified through both Phius (CPHC) and PHI (CPHD), meeting the Mass Save consultant requirement on either pathway. We deliver the full early-design scope: feasibility study, parametric envelope and HVAC analysis, WUFI-Passive / PHPP modeling, charrette support, and certification submission.
// Code adoption status varies by municipality and incentive amounts are updated periodically. Confirm current details with the Massachusetts Department of Energy Resources and the Mass Save program administrator before relying on them for project decisions.
On multifamily, a well-run Passive House project typically carries roughly a [2-3%] construction premium that operating savings can recover. On custom residential, much of the "premium" is a one-time learning curve. Costs vary by team and scope. We will show you the numbers for your project before you commit.
Early involvement gives the team more leverage and makes the design budget work harder. Send us your drawings at any stage and we'll tell you where your project stands.
