Design-stage energy briefs
with sources, not slogans
Route projects by north-star preference — energy independence, sustainability, ROI, or max-tech. Export a consultant-ready intent pack from Passport-grounded projections.
Planning aid only; not SAP, PHPP, or HEM certification.
View retrofit sample brief · My saved projects · Architect Pro · Practice inquiry
Shape a consultant handoff in seconds
Enter a rough floor area and pick a north star — the handoff sections update from your inputs, not static mock data. Export JSON and Markdown in one click, or open the full planning view with your choices carried over.
Affects roof type, cooling priority, and bridge URL for hot-dry demos (e.g. Petah Tikva).
North star
Consultant handoff preview
Live previewPreview onlyProject assumptions
- ·For your 120 m² detached project — Sustainability north star
- ·Recommended pathway (preference-ranked): efficient electrified — unknown
- ·Climate profile: Temperate (UK)
Envelope & glazing
- ·walls: U ≤ 0.15 W/m²K (concept target)
- ·roof: U ≤ 0.12 W/m²K (concept target)
- ·airtightness: ≤ 1.0 ACH @ 50 Pa (design target)
- ·glazing: Balance g-value and Uw by orientation; avoid overglazing south façades
- ·Glazing: ~18% floor area — balanced glazing
Evidence gaps
- ·Site location not confirmed — climate and orientation assumptions provisional
- ·Loft depth / roof build-up not verified on site
- ·No blower-door test scheduled — airtightness target is design intent only
Questions for SAP / HEM assessor
- ·Confirm notional vs actual specification path
- ·Overheating screening method for primary living rooms
- ·Renewable contribution accounting if PV included later
Questions for PHPP consultant
- ·Thermal bridge Psi-values for preferred junction details
- ·Heating/cooling load after fabric specification locked
- ·Ventilation summer bypass strategy with MVHR
How architects use this today
- Structure early client conversations around fabric vs plant
- Test low-regret energy priorities with north-star routing
- Document assumptions before assessor review
- Flag overheating and thermal bridge risks at concept
- Create a clearer brief for SAP / PHPP / HEM consultants
- Show clients why fabric-first decisions matter
- Avoid premature plant sizing and hidden evidence gaps
Not for
- Compliance certificate or Building Regulations sign-off
- Substitute for SAP, PHPP, or HEM lodgement
- Part L or Part O approval
- Detailed whole-building LCA
- Professional indemnity cover
- Replacement for retrofit coordinator, engineer, or assessor
Options architects often miss
Fabric before plant
Heat pumps on weak envelopes are expensive to run and hard to retrofit later.
Read source →Overheating at concept stage
Glazing balance and shading belong in RIBA 0–2, not as late MVHR fixes.
Read source →Embodied vs operational
Indicative embodied ranges help early material choices — not a substitute for LCA.
Read source →
Collaboration workflow preview
Step 4 liveSteps 1–3 and practice workspace remain pilot-only. Versioned Passport export is live today for claimed homes. Practice preview →
- 1.Homeowner invites architect with consent-scoped factsComing soon
- 2.Architect adds design assumptions — owner controls sharingComing soon
- 3.M&E or assessor reviews assumptions — professional review flagsComing soon
- 4.Versioned export captures snapshot + audit trailLive
- 5.Practice tier: editor/viewer seats and export metadata (inquiry)Pilot only
BIM & integration roadmap
Honest status labels — not live unless marked. Full integrations hub →
- SAP / HEM assessor pack (JSON/Markdown)Live
- IFC importSkeleton
- gbXML exchangeConsidering
- Revit schedule exportPlanned
- SketchUp / Vectorworks / ArchicadConsidering
- PHPP handoff packPlanned
- PDF drawing extractionPlanned
- Embodied-carbon export with LCA practitionerPlanned
Passport grounds professional views
Start with the free Health Score. Build the Home Resilience Passport as your evidence improves — the single source of truth for your home's facts.