Home Building & Construction House Extensions

House Extensions in Cheltenham

More space, more light and a home that finally works the way you live — professionally designed and built by a trusted Cheltenham team.

Get a free quote Call 07921 261431

Extending your home

Extra room without the upheaval of moving

Outgrowing your home doesn’t have to mean leaving it. A well-planned extension gives you the space you need, adds real value to your property, and lets you stay in the neighbourhood you love.

At Viskonti Ltd we design and build house extensions across Cheltenham and the wider Gloucestershire area — for period terraces, Victorian and Edwardian homes, 1930s semis and modern new-builds alike. Whatever the style of your property, we match the new space to the old so it looks like it was always meant to be there.

We handle the whole job from first sketch to final coat: planning and building-regs support, groundworks, structure, roofing and a tidy, high-quality finish. Fully insured, on time and on budget, with skilled tradespeople who respect your home while they work.

What we build

Every type of extension

Whatever shape your extra space needs to take, we’ve built it before.

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Single-storey extensions

Rear or side additions that open up your ground floor — perfect for a bigger kitchen, dining area or family room.

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Double-storey extensions

Add downstairs living space and an extra bedroom or bathroom above in a single, cost-effective project.

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Kitchen extensions

The heart of the home, done properly — bright, open-plan kitchen-diners with room for the whole family.

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Orangeries

A light-filled, brick-and-glass room that bridges house and garden and stays usable all year round.

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Garden rooms

Standalone or attached spaces for relaxing, hobbies or entertaining, with real insulation and comfort.

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Side-return extensions

Reclaim that narrow alley beside period terraces to create a wider, brighter ground floor.

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Garage extensions & conversions

Turn an under-used garage into living space, or extend above and beside it for more room.

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Home-office extensions

A quiet, purpose-built space to work from home, separate from the day-to-day of family life.

Built to last

Designed, integrated and future-proofed

A great extension is more than extra floor space — it should feel like part of the original house and cost less to run.

Seamless integrationWe match brick, render, rooflines and internal flow so the new space blends naturally with your existing home.
Planning & design supportWe guide you through drawings, permitted development and full planning applications, and liaise with the council on your behalf.
Energy efficiencyModern insulation, quality glazing and eco-friendly materials keep the new space warm and your bills down.
Building regulationsEvery extension is built to current building regs and signed off correctly, so you have complete peace of mind.

Newly built house extension in Cheltenham with brickwork matched to the original home

How it works

Our extension process

Free consultation

We visit your home, listen to how you want to use the space, and give honest advice on what’s possible and a no-obligation quote.

Design & planning

We develop the drawings, handle planning permission or permitted-development checks, and prepare everything needed for building control.

Build

Our skilled, tidy team carries out the groundwork, structure, roofing and fit-out — keeping you updated and your home clean throughout.

Finish & handover

We complete the decoration and finishing touches, arrange building-regs sign-off, and hand back a space that’s ready to enjoy.

Good to know

House extension FAQs

What affects the cost of a house extension?

Cost depends on the size and type of extension, the number of storeys, ground conditions, the level of glazing, and the quality of fittings you choose. Kitchen extensions and orangeries with lots of glass tend to cost more per square metre than a simple single-storey room. We give a clear, itemised quote up front so there are no surprises.

Do I need planning permission for an extension?

Many single-storey extensions fall under permitted development and don’t need full planning permission, but this depends on the size, your property and whether you’re in a conservation area. We assess your project early, tell you exactly which route applies, and handle any application for you.

How long does an extension take to build?

A straightforward single-storey extension typically takes around 8 to 12 weeks on site, while a double-storey or more complex project can take a few months. We give you a realistic programme before we start and keep you updated at every stage.

Should I choose a single or double-storey extension?

If you mainly need more living space downstairs, a single-storey extension is often ideal. If you also want an extra bedroom or bathroom, a double-storey extension usually gives far better value, as you gain two floors of space for a relatively small extra cost. We’ll help you weigh it up.

Will the work meet building regulations?

Yes. Every extension we build fully complies with current building regulations covering structure, insulation, fire safety and drainage. We work with building control throughout and arrange the final sign-off, so your extension is properly certified.

How disruptive is having an extension built?

We keep disruption to a minimum. Because an extension is built alongside your existing home, you can usually stay living there throughout. Our team works cleanly, protects your property, and only breaks through to the existing house near the end of the project.

Explore more

Related services

Thinking about extra space upwards instead? Take a look at our loft conversions in Cheltenham, or browse our full range of building and construction services. Ready to talk it through? Get in touch for a free quote.