House Extensions Bournemouth

House Extensions Bournemouth

Need more space but do not want the cost and hassle of moving? KVL builds bespoke house extensions in Bournemouth – from bright rear extensions to full double‑storey additions – designed to blend with your existing home and built to current regulations. With over 50 completed projects across Dorset, you get a local team that handles everything from first ideas to final paintwork, with clear quotes and no surprises.

See our full house extension services page for a complete overview of what we build.

Whether you are planning a single storey extension for a bigger kitchen‑diner or a larger two‑storey project to add bedrooms and bathrooms, we make the process straightforward and well‑managed from day one.

Bespoke House Extensions in Bournemouth

Every home, street and plot is different, so we design your extension around how you actually live, not just what fits on paper. As local extension builders, we understand Bournemouth's housing styles, from suburban semis and terraces to detached homes near the coast.

We focus on extensions that:

• Add real, usable space for kitchens, family rooms and home offices

• Let in more natural light with larger openings and glazing

• Connect better to your garden with wide doors and level thresholds

• Feel like they have always been part of your house, inside and out

Browse our completed extension projects in Bournemouth and the wider BCP area to see recent work firsthand.

Not sure if an extension is the right option? If you have an existing garage, a garage conversion in Bournemouth can be a more cost-effective way to gain usable space without extending the footprint.

Our goal is a finished extension that looks and feels seamless, not "bolted on".

Rear Extensions and Kitchen‑Diners

A rear extension in Bournemouth is one of the most popular ways to create a modern, open‑plan kitchen and living space that opens onto the garden. Many homeowners replace old conservatories or small lean‑tos with a well‑insulated, full‑width rear extension that works all year round.

Typical rear extension projects include:

• Single storey kitchen‑diner extensions across the back of the house

• Replacing dated conservatories with proper brick‑and‑block or SIP structures

• Large bifold, sliding or French doors for better garden access

• Rooflights or lanterns to bring daylight into the middle of the room

Local guides for Bournemouth show that single‑storey rear extensions of around 20–30 m² often sit in the tens of thousands of pounds, with final cost driven by size, structure and specification.

Side‑Return and Wrap‑Around Extensions

If you have an unused strip of land down the side of your home, a side‑return extension in Bournemouth can turn that dead space into valuable square metres. It is especially effective on older terraced and semi‑detached houses where kitchens are narrow and dark.

We can help you plan:

• Modest side‑return extensions to widen kitchens and create space for islands

• Wrap‑around extensions that combine rear and side‑return areas into one large L‑shaped room

• Clever roof designs with glazing to keep the new space bright and airy

By reconfiguring internal walls at the same time, a side‑return extension can transform how your ground floor flows, without dramatically changing the front of your property.

Single and Double‑Storey Extensions

We regularly build both single storey extensions in Bournemouth and larger two‑storey additions for growing families. The right choice depends on your budget, your plot and how much extra space you really need.

• Single storey extension – ideal for larger kitchens, family rooms, home offices or playrooms, usually more straightforward in terms of structure and planning.

• Double‑storey extension – adds space upstairs as well, often for extra bedrooms or a new main bedroom with ensuite, while using the same footprint as the ground floor extension.

Independent cost guides suggest that in 2025–2026, UK single‑storey house extensions generally range somewhere around £1,900–£2,500 per m² of new internal space, with many Bournemouth‑specific guides quoting roughly £1,500–£2,500 per m² as a local ballpark depending on specification. During your free quote visit, we talk through size options, finishes and structural requirements so you can see how different choices affect budget.

Planning Permission and Permitted Development

One of the first questions we hear is: "Do I need planning permission for my house extension?" For many rear and side extensions on houses, you may be able to build under permitted development rights if you stay within specific limits on size, height and position. For example, national guidance often allows single‑storey rear extensions up to 3–4 metres beyond the original rear wall depending on whether the property is attached or detached, as long as other rules are respected.

However, there are important exceptions. In Bournemouth you must consider:

• Any previous extensions already added to the property

• Whether you are in a conservation area or have special planning conditions

• The overall height, proximity to boundaries and impact on neighbours

BCP Council and the Planning Portal recommend checking your exact proposal before you start and, if in doubt, applying for a Lawful Development Certificate or full planning permission. As part of our service, we help you and your designer understand what is likely to be allowed and when a formal application is the safest route.

Built to Building Regulations from Day One

Regardless of whether you need planning permission, every house extension must comply with Building Regulations covering structure, insulation, fire safety, electrics and drainage. Cutting corners here can cause serious issues later – especially when you come to sell.

KVL works with structural engineers and local building control teams to ensure that:

• Foundations and steels are sized correctly for your soil and structure

• Walls, floors and roofs meet current thermal and fire standards

• Windows, doors and openings are correctly detailed

• Electrics, plumbing and drainage are installed by competent, certified trades

We arrange inspections and keep paperwork organised, so your extension is fully signed off when the job is complete.

Why Choose KVL for House Extensions in Bournemouth?

Bournemouth homeowners can choose from many extension builders, from small one‑man outfits to larger firms. KVL sits in the middle: big enough to manage full projects properly, small enough that you still know who is on site. Learn more about our team — founded in 2019, with over 50 projects completed across Dorset.

With KVL you get:

• A local extension‑focused team experienced in rear, side‑return, single and double‑storey extensions

• Over 50 completed projects across Bournemouth and Dorset, with references available

• Clear, itemised quotes that explain exactly what is included

• Reliable schedules, honest updates and tidy, respectful tradespeople

• A single point of contact managing the build from first survey to final handover

Planning an extension and a renovation at the same time? Our home renovations in Bournemouth service covers kitchens, bathrooms and full house refurbishments — all manageable alongside your extension under one project.

Our aim is simple: create the extra space you need while keeping the process as calm and predictable as possible.

Our House Extension Process

We use a clear, step‑by‑step process so you always know what is happening with your extension.

1. Free home visit and consultation
   We visit your property, listen to your ideas, look at how you use your current space and discuss budget and timescales.

2. Design, planning and quotation
   Working with your architect or designer – or recommending one if needed – we help refine the design, check likely planning routes and provide a detailed, written quote.

3. Construction and inspections
   Our team builds your extension, coordinates trades and arranges building control inspections at key stages until the project is signed off.

4. Finishing, snagging and handover
   We complete plastering, flooring and decoration as agreed, walk through the project with you, address any snags and hand over a clean, ready‑to‑use space.

Areas We Cover Around Bournemouth

KVL builds house extensions in:

• Bournemouth

• Poole

• Christchurch

• Surrounding BH postcodes across the BCP area

If you are just outside these areas, get in touch with details of your project – if we can reach you within a reasonable time and the project is a good fit, we will do our best to help.