Do I need an architect for my extension?

You do not legally need an architect for most home extensions, but one can add significant value — better design, smoother planning applications, and avoiding costly mistakes. For listed buildings or complex projects, professional design advice is strongly recommended.

What is the difference between an architect and an architectural designer?

An architect is ARB-registered and holds a protected title requiring 7+ years of training. An architectural designer may be equally skilled but without ARB registration. Both can produce drawings and submit planning applications.

When do I need a structural engineer?

You need a structural engineer whenever you are removing or altering load-bearing walls, adding a loft conversion, building an extension, or addressing subsidence. Building control will require structural calculations for these works.

What is a party wall agreement?

A party wall agreement is required under the Party Wall etc. Act 1996 when you carry out certain work near or on a shared wall with a neighbour. A party wall surveyor manages the notice process and resolves any disputes.

SE postcode area

Find trusted Interior Designer professionals in SE

SE covers areas including London. Compare interior designer quotes with clearer local context for travel, access, materials, parking, and property constraints.

What to include in your interior designer quote request

Define the deliverables first: survey, drawings, calculations, planning support, or contract admin.
Ask how many revisions, meetings, and site visits are included before extra fees start.
Confirm who coordinates with planning, building control, or structural input if other specialists are needed.
Request a timeline for first draft, revisions, and final issue so cheap quotes are not hiding delay.
Confirm the postcode district, parking restrictions, access route, and preferred working hours.

Red flags before hiring

A consultant who cannot define the deliverable, review rounds, or planning assumptions.
Very low fixed fees with no explanation of what is excluded or billed later.
No professional indemnity cover or reluctance to share registration details.
Advice that treats planning, party wall, or structural coordination as someone else's problem.
Quotes that ignore access, waste, permits, or travel time across the SE area.

Interior Designer quote pages by SE district

District pages keep postcode SEO useful without generating thin full-postcode pages.

Interior Designer in SE1

Bankside, South Bank, Southwark, Bermondsey, Vauxhall

Interior Designer in SE18

Plumstead, Woolwich

Interior Designer in SE9

Eltham, Mottingham, New Eltham, Falconwood, Chinbrook, Longlands, Kidbrooke

Interior Designer in SE15

Nunhead, Peckham

Interior Designer in SE16

Rotherhithe, Bermondsey, Surrey Quays

Interior Designer in SE5

Camberwell, Denmark Hill, Southampton Way Estate, Peckham

Interior Designer in SE6

Bellingham, Catford, Hither Green

Interior Designer in SE10

Greenwich, Maze Hill, Greenwich Peninsula

Interior Designer in SE3

Blackheath, Kidbrooke, Westcombe Park

Interior Designer in SE13

Lewisham, Hither Green, Ladywell

Interior Designer in SE17

Walworth, Newington

Interior Designer in SE25

South Norwood, Selhurst