Iris Thornefield
ActiveThornefield Architecture Ltd
Chartered Architect · RIBA · ARB registered (No. 000000-K)
I help families turn an uncertain plot or a tired house into a home that works beautifully for how they actually live. Twenty years across Cheshire and London, forty-one completed homes, and a planning approval rate I'm quietly proud of.
Experience
20 years
41 homes completed
Typical fee
8–12%
of build cost, staged
Planning approvals
96%
first-time success rate
Availability
From Jan 2027
One project at a time
Selected work
Three recent projects, chosen by the Expert.
Meadowgate House, Cheshire
New-build 5-bedroom family home · Completed 2024 · £1.2m build
Highbury Terrace, London N5
Victorian terrace extension & refurbishment · Completed 2023 · £380k build
The Old Rectory, Cotswolds
Open-plan kitchen & garden room · Completed 2025 · £290k build
Services
- Feasibility studies & site appraisals
- Concept & developed design (RIBA Stages 1–3)
- Planning applications & listed building consent
- Technical design & building regulations (RIBA Stage 4)
- Tendering & contractor selection support
- Site inspections & contract administration (RIBA Stages 5–6)
Indicative fees
Feasibility from £2,500 · Full service 8–12% of build cost · Fixed-fee planning packages available
Credentials
ARB Registered Architect
Registration No. 000000-K · sample number, verified on LinkMiUp
RIBA Chartered Practice
Thornefield Architecture Ltd · since 2011
Professional indemnity insurance
£2,000,000 cover · certificate on file
Commitment & Conduct Agreement
Accepted v1.0 · 18 September 2026
What owners say
★★★★★
“Iris guided us from a vague idea to a finished home we love. Planning was approved first time and her cost discipline never wavered.”
★★★★★
“Clear drawings, honest advice, and she answered every anxious email within a day. The extension has transformed how we live.”
Your profile could look like this
Register as a Project Expert and get in front of Owners building new homes.
Join as an Expert