Pre‑purchase architect appraisal: the buyer’s complete guide

1) What is a pre-purchase architect appraisal?

A short, focused consultation carried out before you commit to a purchase.
The aim is to evaluate design potential, planning risk and high-level costs, so you can proceed with confidence, renegotiate, or walk away.

At The Potential House, the appraisal is intentionally decision-led. We do not actively seek follow-on design work as part of this service, so the advice is focused entirely on helping you make the right call — not on selling a future project.

2) What it includes

Planning feasibility
Likely routes under planning permission or permitted development, and local constraints such as conservation areas, listed status, green belt and Article 4 directions.

Design potential
Initial ideas for layouts, extensions, conversions and bringing in light — tested against structure, access and context.

High-level cost sense-check
Order-of-magnitude build costs, allowances for professional fees and VAT, plus typical ranges for kitchens, glazing and services.

Risks and dependencies
Party wall matters, rights of light, utilities, highways, access and parking, and freeholder consent if leasehold.

Renovation timescale and sequence
The likely sequence from instruction to start on site, with headline durations.

Offer strategy
How the findings may affect your offer price, conditions or appetite to proceed.

Output
Clear verbal advice on the day, plus a short written summary of opportunities, constraints and recommended next steps.

3) What it is not

• Not a structural survey or valuation

• No detailed drawings or measured surveys

• Not a guarantee of planning consent — it is a professional feasibility opinion to inform decisions

4) Who it is for

• First-time buyers who want confidence before committing

• Up-sizers and down-sizers exploring layout or extension options

• Investors and developers weighing value-add potential

• Cash buyers on short timescales who need swift, objective insight

5) Typical costs and timing

In-person appraisal
£550, including travel within our standard area (Sussex, Hampshire, London and Surrey)

Remote appraisal
£295, UK-wide

Duration
60–90 minutes of consultation, plus a short written summary issued within 2 working days

Check our latest pricing here: Appraisal options and pricing

7) How the process works

Enquiry and quick call
We confirm fit, timescales and access.

Information review
Estate agent details, title plan if available, and any previous consents.

Appraisal session
On site or online. We talk through options, constraints and risks.

Written summary
Clear bullet points covering opportunities, constraints, budget ranges and next steps.

Decision
Proceed, renegotiate, refine your brief — or step away.

9) What you receive afterwards

• A written summary of key findings, ranges and risks

• A rough layout sketch, where helpful

• A simple, practical plan for next steps

• Optional introductions to independent specialists if needed (for example surveyors or engineers)

Ready to move quickly?
Book a free discovery call or reserve an appraisal slot.

10) FAQs

Is this the same as a survey?
No. A survey identifies defects and condition. An architect’s appraisal tests design potential, planning routes and headline costs. Many buyers commission both.

Will you draw designs?
We may sketch concepts live if helpful, but the deliverable is an evidence-based opinion — not a package of drawings.

Can you guarantee planning permission?
No. We identify likely routes and risks based on local policy, guidance and precedent.

Do you work on the project afterwards?
The appraisal is intended to be impartial and stand on its own.
In some cases, and if requested after the appraisal is complete, we may agree to provide further services under a separate appointment — or we can help signpost independent architects if preferred.

How quickly can you help?
Often within a few days. Remote appraisals can usually be arranged more quickly.