Find House Extension Contractors in London | The Page

Home extensions, exactly how you want it

Find skilled house extension contractors to add the space you need.

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My Pager, Michal, was perfect”

James, South West London

Understanding the process for home extension – Phases and timelines

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01
Prep

Identify priorities – Budget – Design inspo

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Time: 2 – 4 weeks
02
Design

Existing drawings – New drawings

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Time: 2 – 5 weeks
03
Planning

Planning even for permitted development

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Time: 8 – 12 weeks
04
Building regs & structural design

Building regs – Structural engineer

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Time: 4 – 8 weeks
05
Party Wall Agreement

Depending on your neighbour

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Time: 2 – 12 weeks
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06
Tender Process

Hiring a building contractor

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Time: 3 – 5 weeks
07
Build

Depending on the size of reno

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Time: 3 – 12 months
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Total timeline
7-15 months

Frequently asked questions

At what stage should I make contact with contractors?

As early as possible. This doesn’t mean book in site visits and pester them for a quote but introduce yourself and your potential project to the home extension contractors. They may be in your area and can meet you and see the project. The relationship with your (potential) extension contractors is incredibly important, so the better/more time you get to know each other, the more likely a successful home extension.

What is the average cost of a side return extension on a Victorian terrace in London?

This is not an exact science and will depend on multiple factors – from the size of the house extension to the specific materials used and size of building contractors. You can expect to pay £100-£140k for the side return, and this includes architects, structural engineers, surveyors, contractors, materials, fittings, glazing, and VAT. A good example of this would be James’s side-return in Clapham, a popular area for house extensions in London.

How do I save money on a rear-extension?

Choose carefully over fittings. Invest in the build rather than interior design choices—as tempting as that fancy kitchen may be—this will mean your home extension will be a better long-term investment. Concrete floors are all the trend at the moment, but instead of pouring expensive and labor-intensive concrete, try using concrete tiles for your kitchen extensions.

Do you always need planning permission for a Victorian terrace side return extension?

Simply, no! They can often be carried out under permitted development rights. That said, in London, there are plentiful factors that mean it’s wise to engage an architect. Depending on the size and height of your proposed house extension, whether you’re impacted by any listed properties or conservation areas, and proximity to your neighbouring property, it may be required. In some cases, consulting home extension contractors can help clarify the need for planning permission.

What size of building company should I choose for my extension?

This completely depends on how much risk you are willing to take and what your budget allows. There are four main types for larger projects: sole trader, builder with some help, house extension contractors with sub-contractors, and a fully established design and build contracting firm. Every homeowner’s case is very different, so this is something we always spend time discussing with you, especially for single storey projects.

Will the value of my home increase with a loft conversion?

Simply, yes. Loft conversions undoubtedly add value to your home’s sale value. Many London homes have already had a loft conversion, and their mean value was increased by up to 20%, according to The Guardian. It’s one of the more popular forms of house extensions in London, increasing living space significantly.

How it works

The Page is free and simple to use.

01

Easily match to contractors

Tell us what you’re looking for and chat with one of our renovation experts. We’ll review your project and match you to your dream contractors.

02

Get relevant & competitive quotes

Arrange visits from house extension builders to get quotes. Get detailed contractor profiles and decide who to instruct.

03

Renovate with confidence

Our renovations experts offer guidance throughout your project. With over 1,000 successful projects, you can trust us to deliver great results.

Home Protection

1,000+ successful projects in London

Reason 1

The good deed piggy bank. We put our money where our mouth is and step in to help fix issues if they arise.

Reason 2

Contractor accountability. As an individual homeowner, you may have limited influence over contractors. However, contractors associated with The Page must adhere to our exceptional standards to secure future projects, ensuring you receive the best service.

Reason 3

Support from start to finish. Homeowners can rely on our renovation experts for comprehensive guidance, potentially saving thousands. From quote comparison calls to project management guidance, we provide end-to-end support.

A kitchen extension behind a house

Have confidence going into your home extension.