A single-storey extension is a new ground-floor room built onto your house, usually at the rear or side, with its own foundations, walls and roof, creating a bigger kitchen, living space or bedroom without moving home.
East Riding of Yorkshire is part of our UK-wide coverage for a single-storey extension. Places we cover include Hull, Bridlington, Beverley and Goole, and we travel to smaller communities across the area as well. Since your property is in England, the relevant planning and building rules are the ones set there. In Yorkshire and the Humber, budget around £33,000–£70,000 with VAT; the figure is confirmed after a survey that costs you nothing.
- Guide price
- £33,000–£70,000 inc VAT
- Time on site
- 10–16 weeks on site
- Planning rules
- England
- Price level
- About 6% below the national guide
- Towns listed
- 5
- Survey
- Free, with a written quote
How much does a single-storey extension cost in East Riding of Yorkshire?
No two jobs cost exactly the same, but the ranges below give a fair picture of a single-storey extension in East Riding of Yorkshire. Pricing for Yorkshire and the Humber runs about 6% below the national guide, and the overall guide is £33,000–£70,000 with VAT included. We'll confirm your figure after surveying the property for free.
| Type of job | What it usually involves | Guide in East Riding of Yorkshire |
|---|---|---|
| Small extension (8–12m²) | A modest rear or side extension, such as a utility room or a slightly larger kitchen. | £20,500–£37,500 |
| Typical rear extension (15–25m²) | A kitchen-diner or family room with bifold doors and a rooflight or lantern. | £33,000–£70,000 |
| Large or wrap-around (30m² plus) | A wrap-around or wide rear extension, often with structural steelwork into the house. | £66,000–£122,000 |
Your price depends mostly on:
- Floor area, shape and number of corners
- Roof type, rooflights, lanterns and the amount of glazing
- Ground conditions, foundation depth and drains to divert
- Finishes, kitchen, flooring and heating specification
What’s included?
- Groundworks, foundations and below-ground drainage
- Cavity walls built and insulated to building regulations
- Flat or pitched roof, with rooflights or a lantern if specified
- Steel beams to open into the existing house
- Windows and external doors, including bifolds if chosen
- Building control inspections and completion certificate
Homes in East Riding of Yorkshire
Hull has large areas of Victorian and Edwardian terraces, many arranged in the city's distinctive short cul-de-sac terraces running off the main streets, plus extensive interwar and post-war estates. Beverley keeps Georgian brick houses, Wolds villages use chalk and brick, and red clay pantile roofs are common across the area. Coastal towns such as Bridlington mix guest-house terraces with bungalows.
Terraced homes often suit loft rooms and rear extensions; pantile roofs may need re-roofing with matching tiles. Bungalows commonly benefit from loft conversions, and older brick houses need repointing with a suitable mortar.
Much of the area is low-lying near the Humber and coast, with flood risk, cold easterly winds and an eroding Holderness coastline.
Planning and building rules in East Riding of Yorkshire
Each UK nation sets its own consent rules, and East Riding of Yorkshire is in England. What follows is a plain summary; we check the specifics for your property with the council before pricing anything.
In England, many single-storey rear extensions are permitted development: typically up to 3 m deep on a semi-detached or terraced house and 4 m on a detached house, no more than 4 m high, and covering no more than half the land around the original house. Larger rear extensions can go through the prior approval process. Side extensions, flats, listed buildings, conservation areas and homes where permitted development rights have been removed need planning permission.
Building Regulations approval is needed for almost every extension, covering foundations, structure, insulation, drainage, ventilation and fire safety. If the work is on or near a shared wall or boundary, the Party Wall etc. Act 1996 may apply.
Rules change and every property is different, so we check the planning history and constraints for your address before we quote.
How does the job run?
Survey and measure
It starts with a survey at the property, free of charge. We check condition, access and services, ask how you want the finished result to look, and answer any questions you have about a single-storey extension.
Written quote
After the survey we send a quote for a single-storey extension that fixes the price for the scope we've agreed. If you want to change materials or scope, we revise it in writing before anything is booked.
Booking the work
Next comes planning the work itself. We set a start date that suits you, line up the right trades, and make sure any approvals for a single-storey extension are in place before the first day on site.
Finish and handover
The work is carried out to the agreed specification, with floors and furniture protected and the site kept tidy. At the end we clean up, walk through the finished job with you and hand over any certificates.
What you can expect from us
Frequently asked questions
Is a flat roof or a pitched roof better on an extension?
A flat roof is quicker to build and usually costs less, gives a clean modern look and works well with a roof lantern. A pitched roof matches the main house, sheds water faster and allows a vaulted ceiling, but it costs more and its height can affect neighbours. Modern flat roofs in EPDM rubber or GRP last well when properly detailed. Planning rules on height can also decide the choice.
Can we stay at home during the build?
Most people stay at home while we build a single-storey extension, because the new structure goes up outside before we break through. The disruptive part is usually the last few weeks, when we open into the house and fit the kitchen. We put up dust screens, keep a safe route through the house and agree a temporary kitchen setup if needed. Water and power are only off for short, planned periods.
How long will a single-storey extension take?
On a typical home, allow 10–16 weeks on site. Larger projects, older buildings and extra work found once things are opened up can extend that, while simpler jobs may be shorter. Your quote includes an estimate of time on site, and your point of contact keeps you updated on the programme as the work progresses.
Do you cover Hull, Bridlington and Beverley?
Yes. As well as East Riding of Yorkshire, we cover Hull, Bridlington and Beverley and the rest of East Riding of Yorkshire. Our coverage is UK-wide, so the process is the same wherever you are: a free site survey, a quote in writing that fixes the price for the agreed scope, and one point of contact while the work is planned and carried out.
What does a typical extension build look like week by week?
A typical single-storey extension follows the same order: clearing the site and digging foundations, building walls up to roof level, then fitting the roof and windows to make it weathertight. Electrics, plumbing, insulation and plastering follow. The last stage is opening into the house, laying the screed and fitting doors and finishes. Building control inspects at key stages, and we book those visits for you.
Towns in East Riding of Yorkshire
Find your town below. Every place listed in East Riding of Yorkshire is covered for a single-storey extension, with the same survey, written quote and fixed-price process.