House extensions

House extensions, from first idea to finished space

An extension can add space, light and value, and avoid the cost and upheaval of moving. It is also one of the bigger projects most homeowners ever take on, so clear planning, realistic budgets and open communication matter as much as the build itself.

Enquire about your project Book a Repair Call us

What we can help with

House extensions: the jobs we take on

Tell us what you are hoping to achieve and we will help you think through the practical steps from design and approvals to construction.

Single-storey rear extensions
Side-return extensions
Two-storey extensions
Wrap-around extensions
Garage conversions
Structural openings and open-plan layouts
Coordinating design, approvals and trades
Associated roofing, electrical and plumbing work

Know what to look for

Is an extension right for you?

You like where you live but need more space

An extension can solve a lack of room without losing your location, schools or neighbours.

Your layout no longer works

A smarter ground-floor plan, such as a kitchen-diner or a utility space, can transform how a house works for you.

You want more light

Large openings and rooflights can make an older, darker house feel much brighter.

Moving would cost more

Once stamp duty, agent and moving costs are counted, extending can be a sensible alternative. Compare both options with real figures.

Practical guidance

Good to know before you start

Planning permission: Many single-storey rear extensions can be built under permitted development, but limits and conditions apply, and not every property qualifies. Flats, listed buildings and some conservation areas have different rules. Check with your local planning authority.
Building Regulations: Almost all extensions need Building Regulations approval, even where planning permission is not required. This covers structure, insulation, fire safety, drainage and more.
Party Wall etc. Act: Building on or near a shared boundary may require notices to neighbours under the Party Wall etc. Act 1996. Take advice early.
Budget with contingency: Hidden ground conditions, drainage and structural surprises are common. A sensible contingency within the budget avoids stress later.
Drawings and structure: Most extensions need architectural drawings and structural calculations. Ask what is included in any quote and what you must arrange separately.

How it works

How a house extensions enquiry works

Initial conversation
You describe the property, what you want and your timescales and budget range. We discuss what is realistic.
Design and approvals
Drawings are developed and the required consents are identified, whether planning, building control or neighbour notices.
Detailed quote and programme
You receive a written scope, costs and a timetable, so you know what is included and when to expect each stage.
Build and handover
The extension is built in stages with regular updates and final checks, then handed over with the relevant certificates.

Project enquiry

Tell us about your house extensions project

The more we know about what you have in mind, the more useful our reply will be. Rough ideas are fine. A call or an email is not a booking.

Prefer to email? info@ryangroup.co.uk
Prefer to talk? 01737 947226
Just need a repair? Use the short repair form
Local guides: Redhill, Reigate, Lingfield. See the areas hub for what is and is not published.

RYAN GROUPMaintenance & Construction

Larger project enquiry

All fields are required unless marked optional.

About you

Your name

We reply by email.

Phone number(optional)

About the project

Type of project

Postcode or town

Where the work would take place. A full postcode is best.

When would you like to start?

Describe the project

What do you want to achieve? Mention size, current layout, any planning or approvals already in place, and anything that worries you.

Drawings and reference images: this form cannot accept uploads. After you send it, reply to the acknowledgement and attach them, or email info@ryangroup.co.uk.

We use these details only to reply to your enquiry. Ryan Group Maintenance & Construction Ltd will email you; nothing is booked and no payment is taken through this form. See our privacy notice.

Questions

House extensions: frequently asked questions

How long does an extension take?

Design and approvals can take weeks or months before the build begins, and construction then depends on size and complexity. We will give you a realistic programme once we understand your project.

Do I need an architect?

Not always, but you will need drawings suitable for approvals and construction. Options include an architect, an architectural designer or a design-and-build route. Ask what is right for your project.

Can I live in my home during the build?

Many people do, but it can be disruptive, especially when services are disconnected or the kitchen is affected. Plan temporary arrangements early.

How much will an extension cost?

Costs vary widely with size, specification, ground conditions and location, so we do not publish figures. Share your plans and budget range and we will be straightforward about what is achievable.