PAS 2035 retrofit design packs
in an afternoon, not a fortnight.
Retrofit Design Pro is the AI-assisted design platform for Retrofit Coordinators and Designers working to PAS 2035:2023. Auto-populate from RdSAP, generate compliant design packs, annotate floor plans, and export handover-ready PDFs — all in one place.
~90%
Time saved vs manual PAS 2035 packs
17
Design sections automated
40+
Pages per generated design pack
100 MB
Condition surveys supported
Features
Every PAS 2035 section, automated.
Retrofit Design Pro isn't a generic template tool — it's built ground-up for PAS 2035:2023 by Retrofit Coordinators who ship designs weekly.
AI-assisted design
Emergent LLMs (Claude Sonnet 4.5 · Gemini 3 Flash · GPT-5.2) suggest measure specs, ventilation strategies and moisture calculations tailored to the property's RdSAP.
RdSAP auto-populate
Drop an RdSAP XML in — property address, assessor details, dwelling type, EPC bands, existing fabric U-values and heating characteristics populate automatically.
Floor plan annotator
Multi-page floor plan annotation with EEM markers, drag-to-position legend, and PAS 2035-compliant symbology baked in.
Compliant PDF export
40+ page design pack with cover page, moisture assessment, interaction matrix, sequence of installation and appended BREGS + manufacturer specs.
Team workspaces
Multi-tenant B2B — invite Designers and Assessors into your workspace with role-based permissions and per-project visibility rules.
Handover letters + tenant docs
Auto-generated intro + handover letters, tenant hierarchy PDFs and 11-page process map, all branded to your organisation.
Condition Survey AI
Upload survey PDFs up to 100 MB — Gemini 3 Flash extracts defects, moisture risks and pre-existing fabric so you can one-click apply across the design.
Admin material library
Central library of BBA certs and installation guides — auto-appended to design packs based on the measures selected.
Workflow
Four steps. Any dwelling. Any funding scheme.
01
Upload RdSAP
Drop the assessor's XML in — every property field auto-populates in seconds.
02
Select measures
AI cross-checks measure compatibility with existing fabric, ventilation and moisture strategy.
03
Annotate + review
Mark up floor plans, upload photos, run pre-flight compliance checks against PAS 2035.
04
Export + hand over
Client-ready PDF pack, handover letter and Building Control attachments — one click.
Frequently asked
The short answers.
Which PAS 2035 version do you support?+
PAS 2035:2023 (current). Design packs follow the 17-section structure required for TrustMark and the major funding schemes (ECO4, GBIS, SHDF, HUG, WCF).
Do I need to be a TrustMark Retrofit Coordinator to use it?+
No — Designers, Assessors and Coordinators all use it. Role-based permissions inside your workspace decide who can edit design content vs upload surveys.
How is my client data handled?+
UK-hosted, encrypted at rest, no data shared with third parties. Files up to 100 MB per upload. Full audit log (Phase 7) for enterprise customers.
Can multiple designers collaborate on the same project?+
Yes. Workspaces support Owner, Admin, Designer and Assessor roles. Set your workspace to 'open' visibility so the whole team sees every project, or 'private' for creator-only.
What about existing PAS 2030 designs?+
Retrofit Design Pro is PAS 2035:2023 first. PAS 2030 installation certs can be attached as supporting evidence to the pack.
Which AI models do you use?+
Best-of-breed via Emergent LLM: Gemini 3 Flash (RdSAP extract), Claude Sonnet 4.5 (moisture strategy narrative), GPT-5.2 (measure suggestions).
Ready to see it on your next project?
Book a 20-minute demo — bring an RdSAP XML and we'll design the pack live on the call.
Book a demo