New Construction
Full Title 24 performance-method modeling for custom single-family homes. Envelope, HVAC, water heating, PV trade-offs, optimized to pass.
- Single-family
- 2025 heat-pump baseline
- PV & battery modeling
CF-1R · PERFORMANCE METHOD · 2025 CODE
Flat-fee residential energy compliance reports from BoK Energy Design. Thirty-plus years at the drafting table. Hundreds of CF1Rs delivered, emailed as 8.5 × 11 PDF sheets in one to three working days.
Years at the table
Flat fee, per report
Typical turnaround
CA climate zones covered
§ 02 · SCOPE OF WORK
Full Title 24 performance-method modeling for custom single-family homes. Envelope, HVAC, water heating, PV trade-offs, optimized to pass.
Additions of any size, from a primary-suite expansion to a second story. Alterations modeled on the energy-only performance path. No envelope gymnastics required.
Detached, attached, and junior accessory dwellings. Priced the same as any other residence. No surprises for small units.
Each unit modeled and reported separately: duplex is two reports, triplex is three. Clean documentation per dwelling.
NOT IN SCOPE: MULTIFAMILY (5+ UNITS) · POOL / SPA. WE'LL POINT YOU TO SOMEONE WHO HANDLES THOSE.
→ EXPLORE ALL SERVICES§ 03 · FEES, FLATLY
Most consultants won't quote you until you've sent plans. You're getting quoted right now.
§ 04 · PROCESS
SHEET
01
Send a quick email or fill the quote form. Share project type, location, and your timeline.
SHEET
02
Architectural PDFs. Floor plans, window and door schedule, structural if available. We review and send any clarifying questions by email.
SHEET
03
We build the performance model in EnergyPro, trading off envelope, HVAC, water heating, and PV to clear the budget.
SHEET
04
We send a summary of what your project needs. R-values, HVAC, water heater, windows. You approve, or ask for tradeoffs. The code allows plenty.
SHEET
05
Once approved, we register the report with CHEERS and email the certified CF1R as 8.5 × 11 PDF sheets, ready to drop into your plan set.
SHEET
06
Plan-check comes back with comments? Forward them over. Corrections and revisions to address their feedback are free.
NEED IT FASTER? RUSH SERVICE ON REQUEST · ASK WHEN YOU INQUIRE.
→ READ THE FULL WORKFLOW§ 04.5 · CALIFORNIA, IN THREE CHARACTERS
A project in Mendocino fights a different fight than one in Sonoma, or one in Fresno. Three characters to start. The selector below has the rest.

CZ 01 · MARINE
North Coast
FOG · COOL SUMMERS

CZ 02 · COASTAL VALLEY
Wine Country
WARM DAYS · COOL MORNINGS

CZ 12 · CENTRAL VALLEY
Agricultural Valley
HOT · DRY · LOAD-HEAVY
§ 05 · CLIMATE ZONES
California’s energy code treats every region differently. What passes in Zone 3 flunks in Zone 14. BoK Design has modeled projects across every one of them. Select a zone to see the typical character.
HOVER OR TAP A ZONE · SIXTEEN CALIFORNIA CLIMATE ZONES
NOW VIEWING
CZ 12
CENTRAL VALLEY
Sacramento · Davis · Stockton
THE FIGHT
Hot summers, cool winters. The common-case zone.
§ 07 · FREQUENT QUESTIONS
Plain answers to the questions I get every week. If yours isn’t here, the full list is one click away.
§ 08 · NEXT STEP
Emailed PDF. CHEERS-registered. Flat $300.
REV.04 · 2026 · BOK ENERGY DESIGN
SCALE 1:1 · DRAWN BY B.K.