§ SCOPE / SERVICES
Residential.
Every kind of it.
BoK Energy Design has been preparing California Title 24 residential compliance for thirty-plus years. Six scopes, one software, one flat fee. Every CF1R comes CHEERS-registered, delivered as 8.5 × 11 PDF sheets, and ready to hand to plan-check.
§ 01 · WHAT WE DO
One desk. Six scopes.
Every project starts as a PDF and ends as a signed CF1R. In between, we model your building in EnergyPro against the 2025 California Energy Code, choosing envelope, HVAC, water heating, and PV values that both your designer and the code can live with.
The six categories below cover essentially every residential permit in California. If your project doesn't fit cleanly into one of them, email anyway. We'll tell you in one reply whether it's on our desk or someone else's.
CUSTOM SINGLE-FAMILY, GROUND-UP.
New Construction
- Software
- EnergyPro
- Code cycle
- 2025 Title 24, Part 6
- Registry
- CHEERS / ECC (included)
- Turnaround
- 1–3 business days
Full performance-method modeling for new houses in any of California's 16 climate zones. 2025 code is a heat-pump prescriptive baseline, so we plan around it, not into it.
Bo builds your home in EnergyPro (envelope, HVAC, water heating, PV, and battery), then trades off variables until the design clears the energy budget with the smallest impact on your drawings.
If you want to keep a gas range, a ducted furnace, or a specific window package, say so early. The performance method lets us offset one choice with another. Staying prescriptive is simpler, but the performance path is where good design gets rewarded.
Prescriptive baseline
Heat pump for space + water heating, high-efficiency envelope, PV sized to code. Fastest to document.
Performance tradeoffs
Swap a heat pump for a high-efficiency gas system, upsize PV, adjust glazing. Anything the math supports.
PV + battery optimization
Right-size the array against the actual load model. Battery sizing is evaluated where the 2025 code rewards it.
SQUARE FOOTAGE ADDED TO AN EXISTING HOUSE.
Additions
- Software
- EnergyPro
- Code cycle
- 2025 Title 24, Part 6
- Registry
- CHEERS / ECC (included)
- Turnaround
- 1–3 business days
Two paths depending on the size of the addition. Under 700 square feet is a lighter lift. Over 700 sf, we model the whole house.
The 2025 code measures additions on the LSCe scale. LSCe is the long-term source energy score the code uses to rate residential compliance. It replaces the older EDR1/EDR2 scoring.
Regardless of size, the goal is the same: a permit-ready CF1R that matches your plan set, with envelope and mechanicals the contractor can actually build.
≤ 700 sf path
Addition-only model. Existing house is not touched. Simpler scope, same deliverable.
> 700 sf path
Whole-house model: addition plus existing. Required once the addition crosses the threshold.
Addition + alterations
If you are reworking existing walls, windows, or HVAC at the same time, they get folded into one report.
CHANGES TO AN EXISTING HOME, NO ADDED FOOTPRINT.
Alterations & Remodels
- Software
- EnergyPro
- Code cycle
- 2025 Title 24, Part 6
- Registry
- CHEERS / ECC (included)
- Turnaround
- 1–3 business days
When a remodel triggers Title 24, it is usually because you replaced HVAC, replaced windows, re-roofed, or opened walls. Each has its own compliance story.
Alterations use the LSCe-only path. No TDV, no EDR. Bo models the measures you are changing and documents only what the code asks for.
If you are mid-plan-check with a surprise energy comment, send the notes over. Most alteration corrections are fast.
HVAC replacement
Furnace-to-heat-pump swaps, duct sealing, new AC. Testing and documentation depend on what changed.
Envelope retrofit
Added insulation, air-sealing, wall finishes. Documented against the as-altered assembly.
Window replacement
U-factor and SHGC by opening. Whole-house window jobs are usually the easiest CF1R you will ever see.
Re-roof implications
If the re-roof adds insulation or changes deck, the code has opinions. If it is just shingles, usually not.
ACCESSORY DWELLINGS OF EVERY FLAVOR.
ADUs & JADUs
- Software
- EnergyPro
- Code cycle
- 2025 Title 24, Part 6
- Registry
- CHEERS / ECC (included)
- Turnaround
- 1–3 business days
Detached, attached, or junior: a dwelling is a dwelling. ADUs get the same full-residence treatment a main house gets, at the same flat fee.
Detached ADUs are modeled as standalone residences. Attached ADUs share walls with the main house and get modeled with the shared-wall conditions the code expects. JADUs (under 500 sf, inside the existing footprint) are the lightest scope but still need a report.
Size and occupancy change the prescriptive package (heat pump vs. room AC, water-heater sizing, ventilation). Bo sorts that out based on your plans.
Detached ADU
Its own walls, its own systems. Modeled as a freestanding residence.
Attached ADU
Shares one or more walls with the primary dwelling. Shared-wall assumptions captured in the model.
JADU within existing
≤ 500 sf, inside the existing envelope. Usually the lightest scope but still a discrete report.
SMALL RESIDENTIAL, UNIT BY UNIT.
Duplex / Triplex / Fourplex
- Software
- EnergyPro
- Code cycle
- 2025 Title 24, Part 6
- Registry
- CHEERS / ECC (included)
- Turnaround
- 1–3 business days
Title 24 treats each dwelling unit as its own residence. So a duplex is two reports, a triplex is three, a fourplex is four. Same $300 per unit, same turnaround.
Shared walls, shared stacks, and shared slabs are modeled using the party-wall and adjacent-unit conditions the code specifies. That detail matters for U-factor and for LSCe outcomes.
Condo versus apartment doesn't change the Title 24 scope. Both are residential. It does change which CF1R gets signed by whom at permit. Bo will ask.
Duplex · 2 reports
$300 × 2. Each unit gets its own CF1R and its own CHEERS registration.
Triplex · 3 reports
$300 × 3. Party walls modeled between adjacent units.
Fourplex · 4 reports
$300 × 4. Still residential, still EnergyPro, still 1–3 working days.
Condo vs. apartment
Affects ownership and signing, not compliance scope. Same model either way.
WORTH NAMING PLAINLY.
Not in Scope
- Referrals
- Available on request
- Turnaround
- N/A
- Code
- N/A
- Registry
- N/A
Bo runs a single-practitioner residential shop. A few things do not belong on her desk, and she will say so up front.
If your project falls into one of these, Bo will usually know someone to point you toward. Just ask.
Multifamily, 5+ units
Different software (CBECC-Com or CBECC-Res multifamily path) and a different compliance framework.
Pool / spa compliance
Pool and spa have their own code path. We do not model them.
Commercial
Nonresidential Title 24 Part 6 is a separate license and software.
Nonresidential additions
Office, retail, institutional. Outside scope, even if the footprint is small.
§ 07 · HOW EACH SERVICE FLOWS
Same five sheets,
whatever the scope.
Inquire
Email or form. Project type, location, timeline.
Send PDF plans
Architectural PDF. Structural helps when available.
Model & optimize
EnergyPro performance model, tuned to pass cleanly.
CF1R delivered
Registered on CHEERS, emailed as permit-ready PDF.
Plan-check support
Revisions if needed. Our error, zero charge.
§ 08 · TRUST MARKS
Years at the table
CF1R reports delivered
EnergyPro-native
CHEERS registered · all CA