Buying a house to renovate in the UK
Checklist

1) Snapshot checklist

Print or save this and take it to the viewing.

Location checks
Is the property in a conservation area? Is it listed? Is it in green belt or another designated area?

Permitted development basics
Would a modest rear extension or loft conversion be theoretically possible? Confirm later against local guidance.

Structure and services
Roof condition, signs of movement, damp, outdated wiring or heating.
(You will still need a full survey.)

Access and light
How easy is it to bring materials to site? Is there side or rear access? What is the daylight like in key rooms?

Neighbours
Overlooking, privacy and likely party wall implications in terraces and semi-detached houses.

Parking and storage
Affects day-to-day living and can influence planning decisions.

Leasehold
If it’s a flat, ask for the lease, service charge details, planned works and consent requirements.

2) Planning and policy quick scan

After the viewing, do a fast sense-check.

• Conservation areas and Article 4 directions can limit or remove permitted development rights.

• Listed buildings require listed building consent for internal and external changes affecting character.

• Green belt and other designations can restrict extension size and form.

• Previous approvals nearby can indicate precedent — search the council planning portal using the postcode.

If constraints are likely, an architect’s appraisal can map realistic routes forward before you pay for surveys or consultants.

3) Design potential to test at the viewing

Kitchen and living
Can you create one generous, flexible space without removing every internal wall? Note where structure and services may run.

Loft
Is there headroom at the ridge? Around 2.2 metres before construction build-ups is a useful rule of thumb.

Side return
On Victorian terraces, infills of roughly 2m × 4m are common — subject to planning, conservation status and party wall matters.

Outlook and comfort
Will added glazing cause overheating or overlooking? Think orientation, shading and neighbours.

Storage and services
Is there a logical place for utility space, plant and bins?

4) Costs and allowances to sanity-check

Order-of-magnitude only. These help you stress-test the deal.

Build costs
Renovations and modest extensions often fall within broad £/m² ranges. Complex work costs more.

Professional fees
Allow for architect, structural engineer, party wall surveyor, planning and building control fees.

VAT
Most renovations attract 20% VAT. Conversions can have different rates — confirm early.

Contingency
Allow at least 10–15% for unknowns.

If the sums are tight or the scope is unclear, an appraisal before you offer can be invaluable.

5) Risks and red flags

• Structural movement: cracks wider than a 5p coin, sloping floors, sticking doors

• Damp and water: staining, salts at skirting height, persistent musty smells

• Services: very old electrics, ageing gas appliances

• Rights and access: shared drives, potential rights of light issues in dense areas

• Flood risk: check flood maps and insurance history

• Trees: large or protected trees close to foundations

These don’t automatically kill a deal — but they affect scope, cost and programme.

6) Leasehold and freeholder considerations

For flats and some houses on private estates, alterations often require freeholder or management company consent.
Budgets should allow for fees, lead-in time and uncertainty.

Ask for:

• the lease

• details of planned major works

• any building safety or cladding issues

7) Timelines you can actually plan around

• Allow time for appraisals, surveys and mortgage valuation before exchange.

• Planning decisions typically take 8–12 weeks, plus validation and lead-in.

• Design, approvals and tendering take months, not weeks.

• Good contractors book up well in advance.

8) When to bring in an architect’s appraisal

• When you like the house but can’t see how to make the plan work

• When planning policy or constraints look complex

• When you need a cost and risk sense-check before bidding

Get clarity early.
Book a free discovery call or view appraisal options.

9) FAQs

What’s the difference between a survey and an architect’s appraisal?
A survey identifies defects and condition. An appraisal tests what you can change, what it might cost, and the likely planning route.

Can I rely on permitted development?
Not always. Designations and Article 4 directions can restrict or remove it. Always confirm the planning context.

Will you help after I buy?
Our pre-purchase advice 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 signpost independent practices.

How much contingency should I allow?
At least 10–15% for unknowns. Complex or heavily altered buildings often require more.