Penticton Step Code Requirements
Current Step: 3 | ACH Target: 2.5 ACH50 | Climate Zone: 5 | HDD: ~3,400 | Permit Office: penticton.ca/permits | Permit Counter: 171 Main Street
What’s required right now
Step 3 is mandatory for all new Part 9 residential builds in the City of Penticton. The airtightness target is 2.5 ACH50, verified by blower door test before occupancy. Penticton sits in Climate Zone 5 with HDD around 3,400, slightly milder than Kelowna’s 3,715 thanks to its position between Skaha and Okanagan lakes.
Most builders hit 2.5 ACH50 with disciplined manual sealing. Builders pushing toward Step 4 (1.5 ACH50, expected 2027) are increasingly turning to aerosol air sealing for predictable results.
Skaha vs Okanagan basin: micro-climate matters
Penticton straddles two distinct micro-climates that show up in HOT2000 modeling and in finished building performance.
| Area | Lake influence | Heating considerations |
|---|---|---|
| Okanagan Lake shoreline (north end) | Strong moderating effect | Mildest winters in Penticton |
| Downtown / Main Street corridor | Mixed | Standard CZ5 |
| Skaha Lake shoreline (south end) | Moderate | Warmer summers, similar winters to downtown |
| Naramata Bench (east) | Slope exposure to morning sun | Cooler nights, longer heating season |
| Apex / Kaleden uplands | Elevation | Significantly colder, treat as upper-CZ5 |
Builders working on the Naramata Bench or above 600 m elevation toward Apex should budget for R-7.5 exterior insulation as a minimum and check window U-values against the 1.4 W/m²K floor. The lakeshore properties, by contrast, often pass Step 3 with R-22 cavity walls and standard double-pane low-E glazing.
Permit process at the City of Penticton
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Pre-construction. Energy advisor produces compliance report from HOT2000 model. Submit with permit application at City Hall, 171 Main Street, or via the online portal. Allow 3 to 5 weeks for permit issuance for typical Part 9 builds.
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Mid-construction (optional). Pre-drywall blower door test is not currently incentivized by Penticton (unlike Kelowna’s $325 program). Run one anyway: pre-drywall testing catches leaks before drywall closes them in.
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As-built. Final blower door test plus updated compliance report. Required before the City issues an occupancy permit.
The Building Permits desk handles standard residential applications through the online portal. Multi-family and complex commercial-residential mixed-use projects typically require a pre-application meeting.
Rebate stack for Penticton projects
| Source | Amount | Notes |
|---|---|---|
| FortisBC New Home Program | $9,000 to $15,000 | Step 4 with hybrid heat pump |
| FortisBC New Home Program | $11,000 to $20,000 | Step 5 with hybrid heat pump |
| CleanBC Better Homes | $4,000 to $10,000 | Heat pump rebate, stacks with FortisBC |
| Greener Homes Loan | up to $40,000 | Interest-free for energy upgrades |
Penticton sits inside FortisBC’s full natural gas service area, which means builders here get access to the New Home Program rebate tiers directly. Combined potential on a single Step 4 home: $15,000+ in straight rebates. See the full Step Code rebates guide for stacking rules.
Common compliance gaps in Penticton builds
Recurring fail patterns in South Okanagan builds:
- Heat-driven shrinkage gaps. Long, hot summers in Penticton stress sealants more than wetter coastal climates. Use sealants rated for high-UV exposure on south-facing penetrations
- Slab edge insulation. Frequently neglected on lakeshore lots where frost depth seems irrelevant; still required for Step Code modeling
- Window head flashing. Builders working with stucco finishes commonly miss the air seal at window heads
- Crawlspace transitions. Older Penticton neighborhoods favor crawl-space foundations; the rim-to-mudsill seal is a top failure point
Run a pre-drywall blower door test on every build. The cost to find and fix leaks goes up sharply once finishes are in. See the air sealing checklist for the rest.
What’s coming in 2027
Step 4 is expected provincially in January 2027 at 1.5 ACH50. Penticton’s milder winters make Step 4 marginally easier to model than in Kelowna or Vernon, but the airtightness target is climate-independent. Builders planning Step 4 transitions in Penticton should pilot a 1.5 ACH50 build now, take the FortisBC rebate, and use the data to refine your air barrier approach.
Next steps for your Penticton project
- Identify your micro-climate from the table above and adjust assemblies
- Run the rebate calculator for project-specific numbers
- Review the Step 4 readiness checklist before your next build