Home Extensions
Side Extension | Rear Extension | Side Return | Double Storey Extension
Our team of experts will take care of the entire project for you, from planning, building work, to finish! All extension projects are covered by an industry leading 12 year warranty.
Expert design
Our designs, inspired by your ideas, use exact measurements for an ideal use of space.
Accurate quoting
From day one we’re transparent about all our costings through clear documentation.
Carefully managed
An Opun assistant and regional manager will coordinate the entire project on your behalf.
Trusted professionals
All our trade partners are carefully selected, fully accredited, and DBS checked.
First-class Warranty
When the work is complete, you’ll receive an industry-leading warranty.
Our Projects
Kitchen Extension
A brand new kitchen extension with an appealing Moroccan influence.
Three Story Extension
This contemporary extension with mezzanine really brings the light into the customers...
Spacious Extension
A spacious and bright single story living room and bedroom extension project.
The one thing that stood out for me was the quoting. Like most people I assumed that it was going to be more and ...more
Bettina Von Stamm
Opun means peace of mind. They do more than just the work. They looked after the project so I didn’t have to. ...more
John Pertemps
Period Kitchen
A beautifully updated yet preserved period property kitchen extension.
They dealt with everything from finding the excellent workmen, through to checking the quote and signing off the work. Paying the invoice was very ...more
Ann Jackson
Proudly part of 
An Opun extension means…
Extending your home is an exciting project. More space for you and your family to enjoy in your home, bringing more from the outside inside! Every extension project is unique so we approach each one by understanding your key requirements and the home’s limitations, to maximise the space we can unlock. together.
The Opun process is simple and straightforward. After getting in touch with us, we’ll send out one of our surveyors to meet you at your home. They will do an initial survey and a consultation with you to learn more about your project. A clear price guide is produced a couple of days later. Then our architectural team is ready to produce a full set of structural drawings for your extension. If needed, we’ll will handle the application for planning permission on your behalf.
Opun’s team of fully vetted trade partners will carry out the work on time and on budget. Your dedicated Opun assistant will coordinate the entire project for you, and an Opun regional manager will oversee each phase of the work. At each stage, the work is signed off after a survey with yourself.
When your extension is complete, not only will you benefit from all that extra space and a boost in the value of your property, you’ll also receive an industry-leading warranty on all our work.
Simple steps to your dream projects
The Opun standard
Coordination
Chat with an Opun customer consultant
Call us or leave your number, a suitable time and we’ll call you back to get the ball rolling on your project.
Carefully managed
Customer
Consultant
A home visit from one of our expert designers or surveyors
Together we’ll discuss and explore your dream home improvement project.
Expertly designed
Providing the correct quote for your project
You receive a comprehensive quote with full breakdown and project visualisations.
Accurate quoting
Pre-start meeting and project kick-off
Your Opun regional manager and trade partner will meet you on-site to walk you through your project. After that, everything will be delivered on-site and the project kicks off.
Carefully managed
Personal
Assistant
Work in progress
On-site your project will be managed by our expert trade partners. Our regional manager will oversee progress and quality of work.
Trusted professionals
Final check and sign-off
When the project is completed, our regional manager will organise a final inspectation with you.
Trusted professionals
Finishing up and warranty
Deliverying high quality workmanship and materials, every project is covered by an industry-leading warranty underwritten by the John Lewis Partnership.
First-class warranty
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