House Extensions
Southampton

The team behind Pure Renovation & Design has been building house extensions in Southampton and the surrounding area for 18 years. Rear, side, kitchen, double-storey, we handle all of them, with the same team on site from first dig to final handover. Five-star reviews on Google, fifty plus homes transformed, and most of our work now comes from past client referrals. That is the quiet measure of whether an extension company is actually good.

It depends on size, position, and whether your property sits in a conservation area. Many single storey rear extensions fall under permitted development and do not need full planning permission, but still need building regulations sign off. At the site visit we will tell you which route yours falls under, honestly, before any money changes hands. If planning is needed, we handle the application end to end.

A typical single storey house extension in Southampton runs twelve to sixteen weeks from site start to handover. Double-storey extensions usually run sixteen to twenty-four weeks. Ground conditions, kitchen specification, and weather can shift the programme, so we build realistic contingency into every written schedule and keep you updated weekly on site.

That is the whole point. We spend time matching brick colour, mortar, roof line, window style, and internal finishes so the extension reads as part of the original house, not an add-on. Cheap extensions always look cheap. A good one disappears into the property and makes the whole home feel like it was always that size.

Yes, and they are one of the biggest differences you can make to a rear or kitchen extension. Aluminium bifold doors and large sliding doors flood the space with natural light and open the room straight out to the garden in summer. We handle the structural opening, steel where needed, and the glazing install as part of the build, so the doors are set correctly and sealed properly rather than bodged in at the end. We regularly fit bifolds on projects in Locks Heath, Hedge End, and across Southampton.

Yes, open-plan kitchen-diners are what most of our extension clients are really after. That usually means removing a load-bearing wall and installing a steel beam (RSJ) to carry the load, which we design with a structural engineer and sign off through building control. The result is one bright, connected living space, often finished with bifold doors, a roof lantern or skylights, and underfloor heating.

Most single storey rear or side extensions in Southampton land between £60,000 and £130,000 depending on size, specification, and whether a kitchen fit-out is included. Double-storey extensions typically run £100,000 to £220,000. A detailed written quote from us breaks that number down line by line, so you know exactly what is driving the cost before you commit.

We deliver house extensions in Southampton, Winchester, Fareham, Eastleigh, Locks Heath, Hedge End, Bitterne, Shirley, Totton, Chandlers Ford, Romsey, Alton, Basingstoke, Park Gate, and into Surrey. If your postcode sits in or around Southampton, we can get to you for a free site visit.

Yes. Every extension we build is constructed to current building regulations, and we handle all building control inspections throughout the build, from foundations to final sign off. You receive the completion certificate at handover, which is what you will need when you eventually sell the property.

All the common ones. Single-storey rear extensions, side return extensions, wrap-around extensions, double-storey extensions, over-structure and above-garage builds, kitchen extensions, and garage conversions. Whether you want to open up the back of the house into a kitchen-diner or add bedrooms and an en-suite above, we design the layout around how you actually want to live, then build it with one team from foundations to finish.

Often, yes, if you are building near or on a shared boundary with a neighbour, which is common on semi-detached and terraced homes. The Party Wall Act means you may need to serve notice and agree an award before work starts. We flag this early at the site visit, explain what is involved in plain English, and can point you to a party wall surveyor so it never holds the build up.

Look for three things. A written quote that explains exactly what you are paying for, line by line. Recent reviews with photos of finished work, not just star ratings. And a builder who will still answer the phone a year after handover when a small snag comes up. That is the standard we were built around.