Single Storey Extensions in Newport Pagnell

A single storey extension in Newport Pagnell typically costs £2,400–£3,200 per m² finished ready for decoration — roughly £29,000–£38,500 for a 12m² rear extension, with any kitchen fit-out priced separately. An extension in Newport Pagnell needs building regulations approval — Milton Keynes City Council’s 2026 scheme of charges lists a 10–40m² extension at £700 plus VAT (£840) on full plans, or £769 plus VAT as a building notice; up to 10m² is £555 plus VAT. It either fits within permitted development or needs householder planning permission, which costs £548 from April 2026 and is decided within eight weeks.

Typical cost: £2,400–£3,200 per m²
Council: Milton Keynes City Council
Planning: Permitted development or £548 application
Building regulations: Needed
Ground: Varies street to street

Prices are our 2026 guide prices; your fixed price comes in writing after the free visit. Council fees checked October 2026.

Extensions in Newport Pagnell

Extensions on Newport Pagnell houses

Newport Pagnell has a Georgian High Street on old burgage plots, Victorian villas and terraces on streets such as Mill Street, Silver Street and Tickford Street, and estates built from the 1980s onwards; the neighbourhood plan allocates around 1,400 more homes to 2031.

Most extensions we build here are single storey at the rear, matched to the existing brick or stone, with the drainage and any sewer nearby checked before the footings are dug.

We cover Newport Pagnell (MK16) and the areas around it, including Tickford, Lathbury, Great Linford, Moulsoe, Sherington, Chicheley, Gayhurst and Broughton. Travel does not change the price.

Newport Pagnell specifically

Ground, drainage and conservation in Newport Pagnell

The centre stands on a knoll of Oxford Clay that grades down to Kellaways sands, river gravels and alluvium beside the Ouse and Ouzel. How well the ground drains changes sharply over a short distance, and groundwater is higher near the rivers. Because the ground varies, the foundation depth is confirmed from the trial holes and agreed with building control on site.

Newport Pagnell Conservation Area covers the old town. Its review asks owners not to lose front gardens to hard standing and to keep brick boundary walls with their triangular or half-round copings. At Castle Meadow a separate Article 4 direction covers walls, fences and gates.

The town sits above the confluence of the Great Ouse and Ouzel. Land either side of both rivers is liable to flood, and the Environment Agency issues flood warnings for the low-lying areas. You can check any address on the Environment Agency flood map.

Sources: Newport Pagnell Conservation Area review.

Milton Keynes City Council

Planning, building regulations and fees in Newport Pagnell

Step 1Check whether it fits permitted development, and if you want certainty apply for a lawful development certificate (£274). Planning Portal: extensions
Step 2In the Newport Pagnell conservation area, side extensions and rear extensions of more than one storey always need planning permission.
Step 3If permission is needed, apply for householder planning permission (£548 from April 2026), decided within eight weeks. Pre-application advice from Milton Keynes City Council costs £360 for a householder project (£180 for outbuildings), with a written reply within six weeks. Planning Portal: application fees
Step 4Apply for building regulations approval: Milton Keynes City Council’s 2026 scheme of charges lists a 10–40m² extension at £700 plus VAT (£840) on full plans, or £769 plus VAT as a building notice; up to 10m² is £555 plus VAT. Milton Keynes City Council: building regulation charges
Step 5If the extension is over or within 3m of a public sewer, check Anglian Water’s build-over criteria; a consultation costs £107. Anglian Water: building over or near our assets
Step 6We build to the approved drawings and work to the building control inspections at each stage.

Council fees and rules checked October 2026. Planning fees are the national fees from 1 April 2026.

What is included

Everything below is included in an extension

Drawings and the building control application
Foundations set from a trial hole, not a guess
Drainage diverted or rebuilt where it needs to be
Build-over and party wall matters flagged and handled
Roof and threshold junctions detailed properly
Electrics and plumbing by registered trades, with certificates
Building control sign-off at the end
A five year guarantee, in writing

Questions

Extensions in Newport Pagnell: questions

How much does a single storey extension cost in Newport Pagnell?

A single storey extension in Newport Pagnell typically costs £2,400–£3,200 per m² finished ready for decoration — roughly £29,000–£38,500 for a 12m² rear extension, with any kitchen fit-out priced separately. Your fixed price comes in writing after the free visit.

How much does planning and building control cost for an extension in Newport Pagnell?

Householder planning permission is £548 (from April 2026) if you need it, or £274 for a lawful development certificate. Milton Keynes City Council’s 2026 scheme of charges lists a 10–40m² extension at £700 plus VAT (£840) on full plans, or £769 plus VAT as a building notice; up to 10m² is £555 plus VAT.

Do I need planning permission for an extension in Newport Pagnell?

Many single-storey rear extensions are permitted development within size limits. In the Newport Pagnell conservation area, side extensions and rear extensions of more than one storey always need permission.

Is Newport Pagnell in a conservation area?