Kitchen Extensions Royston
Rear, side return and wraparound kitchen extensions in Royston, the room, the services and the kitchen built as one job.
- Rated 4.9 from 31 reviews on MyBuilder
- Guide from £45,000 (London-derived)
- Free site survey, itemised quote
A kitchen extension in Royston takes a different shape depending on the house. Terraced houses make up 26% of homes here, and on those it is a rear or side infill that turns a narrow galley into a room you can eat in. Semis and detached houses account for 50%, and they take a wider rear or wraparound addition. Flats are 20% of homes, and a flat has no householder permitted development rights, so any extension there starts with a planning application and the freeholder's agreement.
For Royston, on London-derived ranges a rear kitchen extension of about 30 square metres typically costs £45,000 to £97,500 excluding VAT, or £60,000 to £100,000 for a side return; Hertfordshire work generally runs below that. GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Royston: the structural engineer we appoint designs the foundations and steel, we build the room and fit the kitchen, and a registered electrician certifies the electrics.
Price guide
| Work | Indicative range |
|---|---|
| Rear kitchen extension, about 30 square metres, ex VAT | £45,000 to £97,500 |
| Side return kitchen extension, standard to high specification | £60,000 to £100,000 |
| Wraparound kitchen extension, standard to high specification | £80,000 to £130,000 |
| Side return build rate, per square metre of new floor | £2,400 to £3,200 |
| Kitchen supplied and fitted within the extension | £5,000 to £14,000 |
| Structural engineer's fee | £950 to £2,500 |
Indicative London ranges (Resi, MyBuilder and Checkatrade, 2026), not a quotation. Hertfordshire work generally runs below the London figures; your price follows a site visit. Prices checked September 2026. Full breakdown: Extension Cost and Planning Guide.
Quick estimate for Royston
Royston range: choose above

No Article 4 direction in Royston limits a rear kitchen extension
No Article 4 direction takes away householder rights in Royston. North Hertfordshire has only two of that kind, both made on 9 October 2012, and they cover Hitchin Conservation Area and Stockens Green Conservation Area. The rights those directions take away, including enlarging or altering a house, roof alterations and porches, therefore still apply to a Royston house. A house inside Royston Conservation Area faces tighter national rules anyway, because a side extension there, including a side return infill on a terrace, needs planning permission. Outside it, the starting question is whether the design fits permitted development.
Where the design goes beyond permitted development, it is judged against Local Plan Policy D2, which asks an extension to be sympathetic to the house in height, form, roof type, window details and materials. On a Royston semi that points toward a roof pitch and a brick that answer the original house, rather than a flat box in a different finish. We price from the drawings your designer produces and tie the materials schedule to what the approved drawings show, so the finish on site matches the consent.
Housing in Royston
Royston has around 8,040 homes on the Council Tax list: 86% post-war, 4% interwar and 10% predate 1919, with 20% flats and 80% houses. A terrace kitchen extension in Royston starts in a narrow side return, and 26% of homes here are terraced.
The neighbour consultation route for a deeper Royston kitchen
Under the North Herts neighbour consultation scheme, a single storey rear extension can go beyond 3m up to 6m on an attached house, or beyond 4m up to 8m on a detached house. That prior approval route lets a Royston family add a deep kitchen and dining room without a full planning application. The council notifies the adjoining neighbours, and if one objects it weighs the effect on their amenity before deciding. The owner or their designer makes the application, and we build to the answer that comes back.
The larger home extension route is not available on Article 2(3) land such as a conservation area. Royston Conservation Area, designated on 6 October 1969, is Article 2(3) land, so a house inside its boundary needs a planning application for anything deeper than the standard limits. On a planning application, neighbour objections are tested against Local Plan Policy D3, which names loss of daylight and sunlight, overlooking and dominance. A glazed wall facing next door's garden, or a tall parapet on the boundary, are the details to settle before anything is submitted.
Drainage and trenches for a Royston kitchen are dug into chalk
British Geological Survey mapping records no superficial deposit across the centre of Royston, so chalk lies directly beneath the topsoil rather than clay or gravel. For a kitchen extension that changes what the trench conversation is about. Instead of clay shrinkage and root damage, the questions are the depth to sound chalk, any soft pockets or old pits, and what the building control inspector accepts at the bottom of the trench before the concrete goes in.
A new kitchen moves the sink, the dishwasher and often a utility, so the drainage run changes too. Anglian Water is the wastewater undertaker in Royston, and a new connection or a build close to a public sewer is agreed with them before the slab. The Local Plan also records that surface water and groundwater flooding matter more in the district than river flooding, so rain from the new roof needs a planned route away from the house. We set falls and gullies before the floor goes down.
Steel, roof lights and the kitchen fit out in one Royston programme
Opening the back of a Royston house into a new kitchen means removing part of the rear wall and carrying the floors above on steel. The beam and its bearings are sized by the structural engineer we appoint, and the calculations go to building control with the application. Roof lights and a wide glazed opening change the load path again, so the glazing supplier's frame sizes reach that engineer before the steel is ordered, not after it has arrived.
The extension roof should answer the house. Plain clay tiles, red and orange, are the characteristic roofing material in Royston, while Welsh slate came with the railway and those slate roofs sit at a lower pitch. Plain tiles need a steeper roof than slate, so a shallow lean-to against a tiled house may end up in slate or as a flat roof with roof lights. The 27% of Royston homes were built in 2000 or later, and those have their own tile and brick to match. We run the kitchen fit out in the same programme: first fix services while walls are open, plastering, then units, worktops and appliances, with one team answerable throughout.
- New kitchen circuits, with Part P certification from a registered electrician
- Sliding, bifold and steel-framed glazed doors to the garden
- Foundations, drainage and slab with the kitchen services cast in
VOA Council Tax stock of properties, March 2025, for Royston North & Central and Royston South, West & East. Counts rounded by the VOA.
Why Royston Homeowners Choose GS Renovation
You get one firm from the first trench to the last cabinet door. We build to the drawings and consent your designer secures, and we give them the programme and site information they need along the way. The structural engineer we appoint sets the steel, building control inspects each stage, a registered electrician certifies the new circuits and a registered gas engineer moves any gas supply. One site lead keeps the groundworkers, glazier, plasterer and kitchen fitter in sequence, so the room is back in use as early as the work allows.
- Neighbours given notice before the noisy stages
- Screed left to dry before the kitchen floor finish goes down
- Rooflights set out against the engineer's steel layout
Very friendly and I am very pleased with the work he has done, also very clean worker and enthusiastic about his work. Can not fault this company!!!!…
Punctual, worked hard, and did exactly what he was asked and what he said he would do. Overall, a very high quality job. Will use again.
He was very very good. He just got on with the job and we was beey pleased with the result. He Also cleaned everything away when he finished. Will…
FAQ
Frequently Asked Questions about Kitchen Extensions Royston
Why do kitchen extensions quotes in Royston vary so much?
Kitchen extensions quotes in Royston spread widely because scope, not skill, is what differs. A figure that omits the engineer's design, the Hertfordshire Building Control fee or the making good will always undercut one that includes them. Sequence is where cheap quotes cut corners: the boiler flue, soil pipe and gully on the rear wall are moved before the new walls enclose them. GS Renovation lists each element for the SG8 address against £45,000 to £97,500 excluding VAT for a rear kitchen extension of about 30 square metres (London-derived).
Does a kitchen extension in Royston need planning permission?
Not always. A single storey rear extension inside permitted development limits needs no planning application, and no Article 4 direction removes those householder rights anywhere in Royston. A deeper extension can use the North Herts neighbour consultation scheme, up to 6m on an attached house or 8m on a detached one. A house inside Royston Conservation Area cannot use that larger route, and a side extension there always needs a planning application. A listed building is the exception: work that affects its character, inside or out, including an extension or taking out a wall or chimney breast, needs listed building consent from North Hertfordshire District Council, and doing it without consent is a criminal offence.
Can a flat in Royston have its kitchen extended?
Only with planning permission. A flat has no householder permitted development rights, so even a small rear addition needs an application, and a leaseholder also needs the freeholder's consent under the lease. With 20% of Royston homes being flats, it is worth settling before a designer draws anything. Inside the flat, opening a kitchen into the living room is often possible without planning, subject to the lease and building control.
What does the council look for in a Royston kitchen extension design?
Local Plan Policy D2 asks that an extension be sympathetic to the house in height, form, roof type, window details and materials. In practice that means a roof shape and a brick that belong with the house. The North Herts Design Code, adopted as a supplementary planning document on 29 June 2026 in support of policies SP9 and D1, adds detail your designer should read before drawing.
How do neighbours' objections affect a kitchen extension in Royston?
Objections are weighed against Local Plan Policy D3, Protecting living conditions, which names loss of daylight and sunlight, overlooking and dominance. A long glazed side wall or a high parapet on the shared boundary invites exactly those complaints. Talking to next door before the drawings are final, and keeping the eaves low along the boundary, narrows the grounds an objection could rest on.
How long does a single storey kitchen extension take to build?
The shell, from groundworks to a watertight roof, is a matter of weeks rather than months, and the kitchen fit out follows once the plaster has dried. The programme we give you breaks the job into stages with each building control inspection marked, so you can see when the old kitchen goes out of use and plan meals around it.
Will the chalk under Royston affect extension foundations?
It shapes them. British Geological Survey mapping gives the bedrock under Royston town centre as the Holywell Nodular Chalk Formation, with no superficial deposit above it. Trench depth is fixed by what the building control inspector accepts once the trench is open, and an old pit or a soft pocket can take it deeper. Chalk is also frost susceptible, so the trench has to go below the depth frost reaches. We allow for that in the programme rather than discovering it on the day.
Can we keep using the kitchen while the extension goes up?
For much of the build, yes. The new structure rises outside while the existing back wall stays in place, and the kitchen keeps working behind it. The disruptive stretch is when the wall comes out and the steel goes in, followed by the fit out. Where there is space we set up a temporary sink and cooker point so the house keeps functioning.
Who inspects a Royston kitchen extension under the Building Regulations?
Hertfordshire Building Control Limited, a company jointly owned by North Herts Council and seven other Hertfordshire councils, runs the council's service for Royston. The extension needs a building regulations application before work starts, to them or to a registered building control approver if the owner chooses one. The inspector visits at the trench, the drainage, the steel and completion. We book those visits to match the programme so nothing gets covered up before it has been seen.
Every Service, One Team
More GS Renovation Services in Royston
One team for every GS Renovation service in Royston:
Same Service, Nearby Areas
Kitchen Extensions Near Royston
We carry out kitchen extensions across Royston and the surrounding areas. Explore a nearby location:
Ready to Start Your Royston Project?
Free, no-obligation quote for kitchen extensions in Royston.