REScheck & COMcheck Carlisle MA - Quick Facts
Local energy code in Carlisle
- As of July 1, 2024, Carlisle enforces the Massachusetts Specialized (Opt-In) Energy Code on top of the Stretch Code baseline - IECC Climate Zone 5A.
- The Opt-In code goes further than the Stretch baseline: new fossil-fuel homes must be pre-wired for electrification and include on-site solar where roof space allows.
- New all-electric homes rely on heat pumps for heat and hot water; large fossil-fuel homes over 4,000 sq ft must hit net-zero (HERS 0), and multifamily over 12,000 sq ft must be Passive House.
REScheck & COMcheck in Carlisle
- REScheck documents the prescriptive residential path for Carlisle additions, alterations and renovations (from $300); new-construction performance projects use a full HERS energy model instead.
- Commercial projects use COMcheck for the prescriptive path (from $600); larger new commercial buildings need third-party performance certification under the Stretch Code.
- 24-48 hour turnaround - documentation ready to upload with your Carlisle permit application.
Mass Save rebates for Carlisle (2026)
- All-electric renovations and additions can earn Mass Save incentives up to $20,000 (Level 1) or $30,000 (Level 2) for a single-family home, verified by a RESNET-certified HERS rater.
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REScheck & COMcheck Carlisle MA
Need a REScheck or COMcheck in Carlisle? We produce permit-ready energy code compliance reports for homes and commercial buildings across Middlesex County, matched precisely to your plans so your project clears plan review the first time.
What we deliver
A signed compliance report matched to your plans and ready to upload with your Carlisle building permit application.
Understanding REScheck and COMcheck
These are the two standard software tools plan reviewers accept for energy code compliance. Developed by the DOE, they let a Middlesex County project demonstrate that its envelope (and, for commercial, lighting and mechanical) meets the IECC.
What is a REScheck?
For homes, REScheck is the go-to. This DOE program checks residential envelopes — detached houses and multifamily up to three stories — and allows insulation and fenestration trade-offs to show prescriptive or component-based IECC compliance.
What is a COMcheck?
COMcheck handles commercial work and high-rise residential of four stories or more. The DOE tool evaluates envelope, lighting (interior and exterior), and mechanical systems against either the IECC or ASHRAE 90.1, with trade-offs allowed across components.
When Do You Need a REScheck in Carlisle?
REScheck is the simplest path for smaller residential projects in Carlisle that do not need a HERS rating. It is typically the right tool for:
- Residential additions of 1,000 sq ft or less that are not more than 100% of the existing home
- Basement and attic conversions that do not change the footprint or roofline
- Renovations and alterations to existing homes that need envelope documentation
- Detached accessory structures with conditioned space, where Carlisle's building department accepts REScheck
- New homes only in base-code towns; Stretch and Specialized Code towns require a HERS rating or Passive House for new homes
COMcheck Projects in Carlisle
COMcheck is required for commercial and larger projects in Carlisle. Reach for a COMcheck when your project involves:
- High-rise residential buildings of four stories or more
- Envelope work on commercial structures requiring IECC or ASHRAE 90.1 compliance
- Commercial buildings — offices, retail, restaurants, warehouses, and mixed-use
- Tenant fit-outs and interior or exterior lighting alterations
- Restaurant build-outs and retail white-box improvements
What We Deliver for Carlisle Projects
COMcheck report
The COMcheck Envelope, Lighting, and Mechanical Compliance Certificates plus the Plan Review Checklist — the full package a commercial plan reviewer expects for permit submission.
Fast, permit-ready turnaround
We deliver documentation ready to upload with your building permit application, and we answer plan-review questions if the department asks for revisions.
REScheck report
A signed REScheck compliance certificate matched to your plans, the inspection checklist, and the UA trade-off summary showing your insulation R-values and window U-factors meet the residential energy code.
Plans matched to code
We enter your assemblies, fenestration, and (for commercial) lighting and mechanical details exactly as designed, so the report reflects what you are actually building in Carlisle.
Serving Carlisle and Middlesex County
Carlisle sits in Middlesex County, Massachusetts, in IECC climate zone 5A — the cold-climate zone that drives the insulation and air-sealing levels your REScheck or COMcheck must document. We prepare compliance reports for projects throughout Middlesex County, matched to the code edition Carlisle currently enforces.
Transparent Pricing for Carlisle Compliance Reports
Transparent starting prices. Final cost depends on project size, number of assemblies, and scope.
- REScheck (residential): starting at $300
- COMcheck (commercial): starting at $600
- Revisions to match plan-review comments are handled promptly
REScheck reports start at $300 and COMcheck reports start at $600 for projects in Carlisle. Send your plans for an exact quote.
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Which Energy Code Report Does a Carlisle Project Need?
Carlisle has adopted the Massachusetts Specialized Code (the municipal opt-in code, 225 CMR 22.00 Appendix RC for homes and 225 CMR 23.00 Appendix CC for commercial and multifamily). New homes must be built to the net-zero-ready Specialized paths, new homes over 4,000 sq ft must use the all-electric or zero-energy path, and new multifamily buildings over 12,000 sq ft must be Passive House certified.
| Your Carlisle project | What the energy code paperwork usually is |
|---|---|
| New single-family home or low-rise residential building | A HERS rating or Passive House certification on a Specialized Code path. REScheck is not accepted for new homes. |
| Residential addition of 1,000 sq ft or less (and not over 100% of the existing home) | REScheck (REScheck-Web, 2023 Massachusetts Stretch Code) or the prescriptive tables |
| Residential addition over 1,000 sq ft or over 100% of the existing home | A HERS rating of the whole house (HERS 65 or lower mixed-fuel, 70 or lower all-electric) |
| Basement or attic conversion with no change to footprint or roofline | No HERS rating required; REScheck or prescriptive documentation |
| Residential renovation or alteration | Prescriptive alteration rules; REScheck can document the envelope. Large "extensive" alterations over 1,000 sq ft may need a HERS rating. |
| New commercial building up to 20,000 sq ft | COMcheck: Envelope, Lighting and Mechanical certificates plus the Plan Review Inspection Checklist |
| New commercial building over 20,000 sq ft | COMcheck Lighting and Mechanical, with the envelope shown by backstop and thermal-bridge calculations, on a performance path (Targeted Performance/TEDI or ASHRAE 90.1 Appendix G) or Passive House |
| Commercial addition, alteration, or lighting/HVAC change | COMcheck for the altered systems |
| Multifamily building over 12,000 sq ft | Passive House certification (Phius or PHI) |
Based on 225 CMR 22.00 and 23.00 (Massachusetts energy code, 2025 edition). Building departments make the final call, so we confirm the path for your project before we start. Carlisle is in Middlesex County, served from our Somerville (519 Broadway) office.
How We Prepare Your Carlisle REScheck or COMcheck
Send your plans
Email the permit set for your Carlisle project. We tell you the same day whether you need a REScheck, a COMcheck or a HERS rating.
We model the building
We enter every assembly, window, light fixture and HVAC unit as designed and flag anything that fails before the plan reviewer sees it.
Permit-ready report
You get the signed compliance certificates and checklists, ready to upload with your Carlisle building permit application.
Plan review support
If the building department asks for changes, we revise the report and answer the reviewer's questions.
REScheck & COMcheck for Carlisle Permits
Carlisle moved from the Stretch Code, which it adopted in 2011, to the Specialized (Opt-In) Code effective July 1, 2024, according to the state's adoption list. That puts Carlisle among the stricter towns in Massachusetts for energy code paperwork, so it pays to know which report your project needs before you submit.
Permits are issued by the Carlisle Building Department, and applications are filed online through the town's PermitPro portal from Patriot Properties. The town's published building permit requirements list a HERS Preliminary Report for new homes and also for additions and alterations, so confirm with the department whether a REScheck alone will be accepted for a smaller job.
Matching the report to a Carlisle project
- Small additions and alterations: REScheck documents the envelope for a residential addition up to 1,000 sq ft that is not more than 100% of the existing home, where the prescriptive path is allowed.
- New homes: a HERS rating is required (HERS 42 mixed-fuel or 45 all-electric), and the Specialized (Opt-In) Code adds requirements such as on-site solar and electric-ready wiring for mixed-fuel homes. REScheck is not an option.
- Large renovations and additions: work beyond the addition limits needs a whole-house HERS rating of 65 (mixed-fuel) or 70 (all-electric).
- Commercial work: COMcheck covers envelope, lighting and mechanical compliance. Under the Stretch and Specialized codes, a new commercial building over 20,000 sq ft needs more than a COMcheck.
Our Somerville office at 519 Broadway is the closest HEEC location to Carlisle. Send us your plans and we will tell you which report fits before you upload anything to PermitPro.
REScheck & COMcheck Questions for Carlisle Projects
Do I need a REScheck or a HERS rating in Carlisle?
For a new home in Carlisle, you need a HERS rating or Passive House, because Carlisle is on the Specialized Code. REScheck is used for smaller additions (1,000 sq ft or less and not over 100% of the existing home), basement and attic conversions, and renovations.
When is a COMcheck required in Massachusetts?
A COMcheck documents commercial energy code compliance for new commercial buildings up to 20,000 sq ft (envelope, lighting and mechanical), for lighting and mechanical on larger buildings, and for commercial additions and alterations such as fit-outs, lighting changes and HVAC replacements. Massachusetts commercial code is based on the 2021 IECC with state amendments in 225 CMR 23.00.
What does a COMcheck include?
The COMcheck Envelope Compliance Certificate, the Interior and Exterior Lighting Compliance Certificates, the Mechanical Compliance Certificate, and the Plan Review Inspection Checklist. Massachusetts 225 CMR 23.00 Section C103.2 lists these as the construction-document requirements for buildings up to 20,000 sq ft.
What does a REScheck include?
A REScheck compares your home's envelope (insulation R-values and window U-values) to the code using a total UA trade-off, so stronger performance in one assembly can offset another. The report includes the compliance certificate and inspection checklist. Mandatory items such as air sealing and duct sealing still apply.
What size addition needs a HERS rating instead of REScheck?
In Massachusetts, a residential addition over 1,000 sq ft, or over 100% of the existing conditioned floor area, needs a HERS rating of the whole house (225 CMR 22.00 R502.1.1). Converting an existing basement or attic without changing the footprint or roofline does not.
What information do you need to prepare a REScheck or COMcheck?
Plans with wall, roof and floor sections, insulation types and R-values, the window and door schedule with U-factors and SHGC, and for commercial work the lighting fixture schedule with wattages, lighting controls, and HVAC and water heating equipment schedules.
Which software version is used in Massachusetts?
REScheck-Web with the 2023 Massachusetts Stretch Code option for residential, and COMcheck-Web set to the 2021 IECC (or ASHRAE 90.1-2019) for commercial, matching the code Massachusetts enforces.
How much does a REScheck or COMcheck cost in Carlisle?
REScheck reports start at $300 and COMcheck reports start at $600. The final price depends on the size of the project and how many assemblies and systems need to be entered. Send your plans for an exact quote.
Does Carlisle ask for a HERS report with a building permit application?
Yes. Carlisle's building permit application requirements list a HERS Preliminary Report for new homes and for additions and alterations. Ask the Building Department whether a REScheck can stand in for a small addition before you apply.
When did Carlisle adopt the Specialized (Opt-In) Code?
The state's adoption list shows Carlisle on the Stretch Code since January 1, 2011 and on the Specialized (Opt-In) Code effective July 1, 2024. New homes in Carlisle need a HERS rating on a Specialized Code path.
Related: HERS rating in Carlisle · Blower door testing · COMcheck & REScheck reports
Need a REScheck or COMcheck in Carlisle?
Send us your plans and we will tell you which report you need and get it back to you fast — ready for your Carlisle permit.
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HERS Ratings Across Carlisle and Nearby Communities
Home Energy Efficiency Consultants rates new homes, additions, and major renovations throughout Carlisle — including Carlisle Center, and South Carlisle. Every Carlisle project is filed with the Town of Carlisle Building Department, and we handle the energy model, blower door and duct leakage testing, and the compliance paperwork from start to finish.
We also serve the communities right around Carlisle, including Concord, Bedford, Chelmsford, Acton, and Westford. Our Somerville office at 519 Broadway is the closest of our four Massachusetts locations — see our Somerville office or call (617) 501-6788 to get a Carlisle rating on the schedule.
Carlisle Specialized Energy Code — HERS Index Targets
Carlisle enforces the Massachusetts Specialized (Opt-In) Energy Code. The required HERS score depends on fuel type and project scope — a lower index is stricter.
| Project type | Mixed-fuel | Mixed-fuel + solar | All-electric | All-electric + solar |
|---|---|---|---|---|
| New construction | HERS 42 | 42 | 45 | 45 |
| New construction — embodied-carbon credit | 45 | 45 | 48 | 48 |
| Accessory dwelling unit (ADU) | 52 | 55 | 55 | 58 |
| Major alteration / renovation / change of use | 65 | 70 | 70 | 75 |
A HERS rating is triggered by new construction, additions over 1,000 sq ft (or more than 100% of the existing conditioned area), and Level 3 alterations over 1,000 sq ft affecting more than 50% of the home. New homes must also pass a blower-door test at 3.0 ACH50 and include electrification-ready wiring for heat pumps, EV charging, and solar. We model your Carlisle project up front so you know the exact target and the fastest path to hit it — call (617) 501-6788.
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