Middlesbrough house extensions
From a small utility to a two-storey addition, we take on house extensions throughout Middlesbrough, starting with a free visit and a planning check.
- Postcode districtsTS1, TS2, TS3, TS4, TS5, TS6
- Price regionYorkshire and the Humber (×0.94)
- Planning rulesEngland
- Site visitFree, no obligation
Areas we cover around Middlesbrough
Across TS1, TS2, TS3, TS4, TS5, TS6, we can visit, measure and advise. The same team covers Redcar (8 miles), Northallerton (19 miles), Whitby (22 miles), Ripon (32 miles), Scarborough (39 miles), all within easy reach. Just over the County Durham border, Billingham is about 2 miles away.
Choosing the right extension in Middlesbrough
Yorkshire and the Humber combines stone-built terraces in the Pennine towns with brick semis and newer estates elsewhere, so materials and roof details need matching with care.
Depending on the plot, side return extensions and pitched roof extensions are often the strongest options, with double-storey extensions worth considering where there is room.
Approvals for an extension in Middlesbrough
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).
Guide prices for Middlesbrough
We publish guide prices so you can budget before anyone visits. For Middlesbrough they are adjusted by ×0.94, the factor we use across Yorkshire and the Humber.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Double-storey extensions | 32 m² | £54,000 – £71,000 |
| Side return extensions | 11 m² | £24,500 – £31,500 |
| Conservatory replacement extensions | 14 m² | £28,000 – £36,500 |
| Orangery extensions | 16 m² | £42,000 – £53,000 |
| Extensions over a garage | 12 m² | £23,500 – £30,500 |
Every extension type in Middlesbrough
- Conservatory replacement extensions · from £18,500
- Double-storey extensions · from £35,500
- Porch extensions · from £3,750
- Utility and boot room extensions · from £13,000
- Side extensions · from £20,500
- Single-storey rear extensions · from £19,500
- Bungalow extensions · from £24,500
- Extension plans and drawings · from £1,100
- Bedroom extensions · from £24,000
- Home office extensions · from £15,000
- Building regulations for extensions · from £800
- Flat roof extensions · from £19,500
- Annexe extensions · from £51,500
- Orangery extensions · from £28,000
- Extensions over a garage · from £22,500
- Kitchen extensions · from £25,000
- Planning permission for extensions · from £300
- Glass box extensions · from £28,000
- Wraparound extensions · from £33,500
- Pitched roof extensions · from £20,500
- Side return extensions · from £16,500
- Timber frame extensions · from £19,500
Free site visit
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
Design and approvals
Once the layout is agreed, we deal with the council: planning permission or written confirmation that none is needed, plus building control.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Middlesbrough
How much does an extension cost in Middlesbrough?
Using our Yorkshire and the Humber factor (×0.94), a standard-spec single-storey extension of 20 m² is a guide £38,500 to £49,000 including VAT, and a 32 m² two-storey extension £54,000 to £71,000. Your written price follows the survey.
Do I need planning permission for an extension in Middlesbrough?
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.
Who do I contract with?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
How long does an extension take in Middlesbrough?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
Book a free site visit in Middlesbrough
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.