Home Extension Builders in Islington
Islington N1 extension specialists working across Georgian and Victorian property, with Buildaway handling planning, party-wall, structure and finishing.
Your Local Home Extension
Specialists in Islington
Looking for extension specialists in Islington (N1)? Buildaway extends homes right
across N1 - the Georgian terraces of Barnsbury and Canonbury, the houses off Upper
Street, Chapel Market and Camden Passage, and the properties near Angel, Highbury
Corner and the Regent's Canal.
Islington extension specialists work across Georgian and Victorian property, with
Buildaway handling planning, party-wall, structure and finishing. Much of N1 is
conservation area and a good deal of Barnsbury and Canonbury is listed, so the space
is usually found below ground or in a modest rear infill rather than a bold
addition. Buildaway confirms the consent position first, then delivers underpinning,
structure, services and finish on one contract.
Our Home Extension Packages in Islington
Single-Storey Rear Extension
Ideal for expanding your living space. Includes structural survey, architectural drawings, groundworks and foundations, brickwork and roofing, bi-fold or sliding doors, heating installation, building regulation approval.
Side Return Extension (Most Popular)
Complete kitchen and living area transformation. Includes structural assessment, full groundworks, steelwork if required, brickwork and matching materials, glazing and doors, full insulation, electrics upgrade, flooring, building regulation approval, waste removal.
Double-Storey Extension
For those seeking maximum space addition. Includes architectural design, full structural alterations, steelwork and foundations, bespoke staircase, multiple room creation, bathroom or en-suite option, planning and building regulation handling.
Why Islington Homeowners Choose Buildaway
Local teams with expert knowledge of N1, North London, and surrounding boroughs
Based in your area with local expertise and reputation.
Tailored extension designs ideal for Georgian homes, converted flats, and contemporary properties
We handle everything so you don't have to worry.
Transparent and honest pricing with no hidden fees or unexpected charges.
Clear upfront pricing with no surprises along the way.
Hassle-free project management from start to finish
Meticulous craftsmanship in every aspect of your extension.
Successful projects completed near Upper Street, Essex Road, and Highbury Corner
Professional consultation and detailed quotes at no cost.
What's Included in Your Home Extensions Services
Everything you need for a seamless, stress-free home extension from structure to finish.
Full groundworks and structural build
Complete groundwork preparation and structural construction services.
Plumbing, electrics, and heating integration
Professional installation of all mechanical and electrical systems.
Roofing, windows, and external finish
Complete roofing, window installation and exterior finishing.
Plastering, flooring, and decorating
Professional plastering, flooring and decorating services.
Interior fit-out and finishing
Complete interior fit-out and professional finishing touches.
Project management and schedule control
Professional project management and timeline control throughout.
Latest Home Extension Insights
We publish detailed home extension guides and cost insights for homeowners across Islington and surrounding areas, helping customers plan projects with clarity before starting work.
Home Extension Cost in Islington
A local cost guide written specifically for Islington homeowners, with real figures for the area.
Home Extensions London: The Complete 2026 Guide
Everything from feasibility and planning to structure, cost and programme for a London extension.
Single-Storey Rear Extension Cost London
A realistic cost breakdown for the most common extension in London, with the variables that move it.
What Our Clients Say
Real reviews from our satisfied customers.
“It was an absolute pleasure working with Cormac and the Buildaway team. Greg is an absolute star. Cormac’s communication and advice was excellent, and the organisation and sourcing of additional materials was brilliant. A truly great team, I would thoroughly recommend Buildaway if you are after a stress free and top quality renovation.”
Sim Lewis
“We had an excellent experience working with Buildaway. Cormac was incredibly easy to work with, and gave helpful advice. The finished job was neat, professional and completed efficiently. We'd definitely recommend and would use them again!”
Roisin Lawrence
“A great transformation of my bathroom into something modern and sleek. Cormac was professional to work with from the start and was very helpful in taking my ideas and sourcing products to fit the space and look aesthetically pleasing. I felt confident in working with the company as I could ask questions and I was also pleased to get suggestions and ideas…”
Vera Jajechnyk
“Greg's attention to detail and dedication elevated both the experience and the result - he certainly knows his way around a tile. In addition to the bathroom refit, Cormac replaced all the plastic switches, sockets and pull-cords in the house with brushed brass. Highly recommended and will certainly work with the Buildaway team again…”
Kane Dempsey
“I received an excellent service from the outset with a very high standard of the completed work. Cormac was very responsive to my wish for a traditional period bathroom and helped me to source the suite, the tiles, the paneling and flooring. The team are respectful to the home generally. I am very pleased with the finished bathroom…”
Philomena Mulcahy
“The team turned up when they said they would and kept the house tidy each day, which made a big difference while we were living in the property during the works. The quality of the finish is excellent. The bathroom looks fantastic and the bedrooms feel completely refreshed. We wouldn’t hesitate to recommend Cormac and the Buildaway team…”
Helen Sivyer
Frequently Asked Questions
Your questions about home extensions in Islington, answered.
How much does a home extension cost in Islington?
As a guide, a home extension in Islington (N1) runs roughly £3,000–£3,900 for a single-storey rear, £3,900–£5,100 for a larger or wrap-around scheme, and £75,000–£97,500 for double-storey work. UK build costs sit around £1,800–£3,000 per m², and London consistently lands at the upper end. Buildaway fixes your figure in a written quote after survey.
How long does a home extension take in Islington?
Allow roughly 12–20 weeks of build in Islington, depending on scheme. The programme most people forget is before that: design, Islington Council approval and party-wall awards can add 3–4 months to a N1 project. Buildaway runs those in parallel and gives you a realistic combined timeline up front.
Do I need planning permission for an extension in Islington?
Sometimes yes, sometimes no. In Islington, permitted development can cover a modest rear extension, but Islington Council takes a close view on anything altering the street elevation, and heritage designation around Barnsbury and Canonbury removes the easy route. Buildaway checks planning, party-wall and freeholder position together.
What types of extension do you offer in Islington?
Rear, side-return, wrap-around, double-storey and lower-ground - Buildaway delivers all of them in Islington. Terraces around Barnsbury and Canonbury usually point to a side-return; where outward space is limited in N1, going down or reconfiguring inside often makes better sense. We advise from survey.
Do Buildaway handle both design and construction for Islington extensions?
Yes. Buildaway takes Islington extensions from feasibility and design through Islington Council application, party-wall notices, Building Control, groundwork, structure and finish. One contract across every N1 project, so the design intent and the build are the same team's responsibility.
Are your extension specialists local to Islington?
We are in Islington constantly. Buildaway knows N1 property: the boundaries, the ground conditions, and how Islington Council treats rear additions here. That experience makes our feasibility advice reliable rather than optimistic.
Get Your Free Quote
Tell us about your project and we'll get back to you within 24 hours.
We Serve Islington and Surrounding Areas
Find us in the heart of Islington. We are proud to serve our local community.
Nearby Areas We Serve
Below are some of the local areas where you can find Buildaway transforming homes.
Ready to Transform Your Extension in Islington?
We’ve transformed extensions in Georgian terraces, period conversions, and large family homes throughout Islington always delivering results built to last.