Low-rise multifamily buildings in California, duplexes, triplexes, fourplexes, townhomes, condominiums, and apartment buildings, require an LMCC energy compliance report before permits are issued. We prepare yours using CEC-approved software, CHEERS-ready and prepared for submission to California building departments.
California's LMCC compliance pathway applies to all low-rise multifamily residential buildings, any structure up to three stories with two or more attached residential units.
Side-by-side or stacked two-unit buildings. Duplexes are classified as multifamily under California energy code and require an LMCC instead of a CF1R.
Three-unit residential buildings in any configuration. We calculate LMCC compliance for the whole building and each individual unit as required by Title 24.
Four-unit buildings are the most common multifamily investment property. Our base multifamily price covers up to 4 units and 4,000 sq ft.
Vertically-stacked or side-attached townhome developments follow the multifamily compliance path when units share walls or floors.
New condominium construction requires LMCC compliance. We cover full-building calculations for condo projects of any size within the low-rise classification.
Buildings with more than 4 units are priced at $95 per additional unit. Contact us for a custom quote on larger developments or phased projects.
California uses two primary Title 24 Part 6 compliance documents for residential construction. Which one applies depends on the building type:
| Document | Building Type | Who Uses It |
|---|---|---|
| CF1R | Single-family homes, ADUs, JADUs | Homeowners, SFH builders |
| LMCC | Duplexes through low-rise apartments (2+ units, ≤3 stories) | Multifamily developers, investors |
The LMCC accounts for energy use shared between attached units, common area systems, and per-unit mechanical configurations, making it a more complex calculation than a single-family CF1R. Title24Comply handles LMCC calculations for the full spectrum of low-rise multifamily building types.
Wall, floor, and roof insulation for each unit; shared party wall assemblies; window U-factors and SHGC by unit; infiltration and air sealing requirements for the building type.
Heating and cooling equipment efficiency per unit; individual or shared duct systems; ventilation rates meeting California mechanical code for each occupied space.
Per-unit or central water heating efficiency requirements; heat pump water heater specifications; distribution system requirements for central hot water systems.
Lighting power density for dwelling units; common area lighting compliance; EV-ready and solar-ready provisions applicable to the development type and climate zone.
Order via our pricing page or contact us for larger projects. Provide architectural plans, number of units, square footage per unit, and mechanical system info. We'll confirm scope and pricing.
Our team runs the multifamily Title 24 compliance calculations using CEC-approved software, accounting for each unit's envelope, mechanical systems, and applicable climate zone requirements.
Your completed LMCC document, registered in the CHEERS statewide database, is delivered by email as a PDF, ready to attach to your permit application within 2–3 business days.