London Building & Renovation Services

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London Builders

Find local Builders in London

Our team at Opun work on a range of home improvements, including:

  • Loft Conversions
  • Home Extensions
  • Kitchen Renovations
  • Garage Conversions
  • Side Extensions
  • Bathroom Renovations

Who are Opun?

Opun from John Lewis

In 2018, Opun joined John Lewis. Opun manages large-scale home improvement projects. By using us for your building work, you can now benefit from an end-to-end home improvement service, which includes design, project management and execution. 

For major projects, including loft conversions, extensions and renovations, building work is  backed up by a 12-year John Lewis warranty on labour and materials.

Finding Local Builders in London

Builders in London

If you're looking for a quality builder in London, we can help.


All of our building contracts are run and managed by the Opun team and are backed up with a John Lewis guarantee to give you complete confidence and peace of mind. 


Our end-to-end home renovation service operates across the London area where we have professional teams for all types of domestic property building projects. All of our builders in London operate to the highest standards and craftsmanship, so you end up with your dream property renovation.  We offer building services for every kind of project, including house extensions, loft conversions and side return extensions.


We've recently completed jobs in Balham, Regents Park, Shoreditch, Tottenham, Edgware, Clapham, Wimbledon, Shepherds Bush, Notting Hill and Stratford. Our builders also carry out projects anywhere within Greater London, so cover all the areas around Croydon, Watford, Enfield, Barnet, Bexley, Bromley, Sutton, Richmond and Harrow. 


Our attention to detail helps you get the new living space you and your family want. 

Our experienced builders in London are used to working with architects, structural engineers and party wall surveyors. At each stage of your building project, you'll be invited to sign off the work yourself. The Opun team will also be there to make sure your project is delivered on time and to budget. 


You also get a John Lewis-backed guarantee after your building project is completed.  


Our recent projects have included building a stunning two-storey extension in Surbiton, which added an extra 40% of living space to our customers' home. 


From design to build, we’re with you every step of the way for your building work.


Opun London Building Services

Help with planning and inspiration for your project
Manage all tradespeople and logistics
Provide a full end-to-end renovation service

How much do our builders cost in London?

How much do Builders cost in London?

It's difficult to give costs for builders without understanding your project in more detail. Every property renovation is different and costs are also dependent on the products you install.  Project details such as skylights, plastering, the type of glass you want and whether you need construction vehicles to dig foundations, all affect the cost of your builder. 


To get an estimated cost for your building work, contact the team for a free quote. Once you contact Opun, we’ll send out one of our surveyors to meet you at your home. They'll do an initial survey and a consultation with you to learn more about your building project. After this, we can start to give you cost estimates, as well as timelines for your project. 



We can help you with a complete end-to-end home renovation, which includes inspiration, design, construction, extensions, conversions and project management. Each project booked with our London builders also qualifies for a 5 year John Lewis warranty for kitchen and bathroom projects, or 12 years for loft conversions and home extensions.


The best way to get in touch is to call our team on 0800 048 8743.

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