Home extensions in Clacton-on-Sea
Every type of house extension in Clacton-on-Sea, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsCO15, CO16
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
What extensions cost in Clacton-on-Sea
Prices on this page use our East of England factor of ×1.06, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £31,500 – £41,000 |
| Wraparound extensions | 25 m² | £60,500 – £77,000 |
| Kitchen extensions | 20 m² | £44,500 – £56,500 |
| Side return extensions | 11 m² | £27,500 – £35,000 |
| Single-storey rear extensions | 20 m² | £43,000 – £55,500 |
| Orangery extensions | 16 m² | £47,000 – £59,500 |
Do extensions in Clacton-on-Sea need planning permission?
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a single-storey side extension can be permitted development if it is no more than 4 m high and no wider than half the width of the original house. Two-storey side extensions, and any side extension on designated land such as a conservation area, need a householder planning application.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
Which extension suits a Clacton-on-Sea home?
The East of England mixes market-town terraces, inter-war semis and modern estates. Clay soils are common in parts of the region, which can affect foundation design.
The types we would usually look at first for a home in Clacton-on-Sea are single-storey rear extensions, double-storey extensions and wraparound extensions, depending on the garden and how the house is laid out.
Where we work near Clacton-on-Sea
We cover Clacton-on-Sea and the postcode districts CO15, CO16. Neighbouring towns we cover include Harwich (12 miles), Colchester (13 miles), Maldon (21 miles), Witham (22 miles), Southend-on-Sea (26 miles). For homes towards Suffolk, Felixstowe is around 15 miles away.
Extension types and starting prices
- Bedroom extensions · from £27,500
- Flat roof extensions · from £22,000
- Side extensions · from £23,000
- Kitchen extensions · from £28,500
- Pitched roof extensions · from £23,500
- Porch extensions · from £4,200
- Single-storey rear extensions · from £22,000
- Extensions over a garage · from £25,000
- Planning permission for extensions · from £350
- Annexe extensions · from £58,000
- Double-storey extensions · from £40,000
- Orangery extensions · from £31,500
- Conservatory replacement extensions · from £21,000
- Building regulations for extensions · from £950
- Timber frame extensions · from £22,000
- Bungalow extensions · from £27,500
- Extension plans and drawings · from £1,250
- Side return extensions · from £19,000
- Utility and boot room extensions · from £14,500
- Home office extensions · from £16,500
- Glass box extensions · from £31,500
- Wraparound extensions · from £38,000
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
Build and sign-off
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Clacton-on-Sea
How much does an extension cost in Clacton-on-Sea?
Using our East of England factor (×1.06), a standard-spec single-storey extension of 20 m² is a guide £43,000 to £55,500 including VAT, and a 32 m² two-storey extension £61,000 to £80,000. Your written price follows the survey.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Do you cover all of Clacton-on-Sea?
Yes, including the surrounding parts of Essex. Site visits are free and there is no obligation.
Do I need planning permission for an extension in Clacton-on-Sea?
Not always. It depends on the size, position and your property's history. Many single-storey rear extensions in England are permitted development or can use prior approval.
Book a free site visit in Clacton-on-Sea
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.