Covering Seaford
Alongside Seaford, we also cover Rottingdean, Eastbourne (8 miles to the east) and Hailsham.
Homes in the South East
Housing across the South East mixes inter-war semis, post-war estates and older cottages in villages and market towns, so rear and side extensions, hip-to-gable lofts and garage conversions all come up regularly.
What does architectural design and planning involve?
Architectural design and planning covers everything before building starts: a measured survey of the house, design options, planning or permitted development drawings, the application itself, building regulations drawings and structural calculations. We offer it on its own or as part of a design-and-build project.
- Measured survey of the existing house
- Planning or lawful development certificate drawings
- Building regulations drawings and specification
What will architectural design and planning cost?
Use these ranges to budget for architectural design and planning; the survey turns them into a fixed price for the agreed specification.
| Architectural design and planning | Guide price incl. VAT |
|---|---|
| Measured survey and existing drawings | £500 to £1,200 |
| Planning drawings and application | £1,200 to £3,000 |
| Building regulations drawings and specification | £1,000 to £2,500 |
| Structural calculations | £500 to £2,000 |
What approvals does architectural design and planning need in England?
In England we deal with the council’s planning team for permission or a lawful development certificate, with building control (the council or a registered building control approver) for inspections, and with neighbours under the Party Wall etc. Act 1996 where it applies.
We confirm whether your project is permitted development, needs prior approval or needs a householder application, and prepare the right submission. A lawful development certificate is the best proof that permitted development work is lawful.
What can change the price or programme?
- Pre-application advice from the council can help on sensitive sites.
- Conservation areas and listed buildings need extra design care and supporting statements.
How does the project run?
- Send us the details. Give us a postcode, a rough idea of size and some photos, by phone, form or the guide price tool.
- Free site visit. We measure up, look at access, drains and the structure, and talk through options and budget.
- Design and fixed price. You get drawings and a written price for the agreed specification before anything is ordered.
- We build it. Work follows an agreed programme, with inspections at each stage and a final sign-off.
Your questions answered
How much do extension plans cost?
Typically £3,000 to £7,000 including VAT from measured survey to building regulations drawings, plus council fees.
How long does planning take?
Councils aim to decide householder applications within eight weeks of validation.
Do you work in Seaford?
Yes. Seaford is within our coverage for architectural design and planning, along with nearby Rottingdean and Eastbourne.
Also covering
- Architectural design and planning in Rottingdean
- Architectural design and planning in Eastbourne
- Architectural design and planning in Hailsham
- Architectural design and planning in Brighton
Learn more about architectural design and planning, or see every project we cover in Seaford.

