Home Extension Builders in Keston
Keston BR2 home extension from Buildaway: one team responsible for design, planning, groundwork, structure and the space you end up living in.
Your Local Home Extension
Specialists in Keston
Looking for home extension builders in Keston (BR2)? Buildaway extends homes
throughout BR2 - the detached houses around Keston Mark and Heathfield Road, the
properties bordering Keston Ponds, Keston Common and Hayes Common, and the streets
toward Downe, Leaves Green and Bromley.
Keston home extension from Buildaway puts one team on design, planning, groundwork,
structure and the space you end up living in. BR2 plots often allow a substantial
rear or double-storey addition, and some sit close enough to green belt and common
land that the planning route needs care. Buildaway establishes the position, handles
the application and building control, then builds it - with the full extension cost
agreed in writing before we start.
Our Home Extension Packages in Keston
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 Keston Homeowners Choose Buildaway
Experienced teams with extensive knowledge of Keston Park's private estate, Keston Village, and the Bromley borough
Based in your area with local expertise and reputation.
Bespoke extension designs tailored for executive homes, family homes, and period 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.
Precision project management from concept to completion, ensuring stress-free delivery
Meticulous craftsmanship in every aspect of your extension.
Proven results across Commonside, Fox Hill, and near the historic Keston Ponds
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 Keston and surrounding areas, helping customers plan projects with clarity before starting work.
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.
Planning Permission for Home Extensions
When you need permission, when permitted development covers you, and how to avoid a refusal.
What Our Clients Say
Real reviews from our satisfied customers.
“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
“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
“We’ve had a genuinely fantastic experience with Buildaway. Cormac was ultra responsive and excellent at communicating with us throughout our project. The quality of the work was excellent - so much so, that we extended our project by adding a range of other building renovations to our original ask, each completed with care and precision…”
Kiran Collier
“I am extremely impressed, happy and proud of what he and his team of Archie, Ben and Danny delivered. They all went beyond and far, I am very grateful for what they have done for me. I would 100% recommend Buildaway for any building, renovation etc - an excellent team with a good rapport, team spirit and working harmoniously together. Thank you Team Buildaway…”
Betty Lwanga
“From scoping to completion, Cormac was always very responsive, answering any questions we had on product selection and helped us source the products to get the best price. His team worked extremely hard and a big shoutout to Greg for his attention to detail! We couldn’t be happier with the results and would highly recommend Buildaway for any building project in the future…”
Georgina Ehmcke
“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
Frequently Asked Questions
Your questions about home extensions in Keston, answered.
How much does a home extension cost in Keston?
Most Keston extensions land between £40,000–£60,000 and £60,000–£80,000, with double-storey schemes around Keston Mark and Hayes Common reaching £100,000+. What people underestimate in BR2 is below ground: foundations, drainage diversions and party-wall works are real cost before anything is visible. Buildaway prices them in, not after.
How long does a home extension take in Keston?
Allow roughly 12–20 weeks of build in Keston, depending on scheme. The programme most people forget is before that: design, Bromley Council approval and party-wall awards can add 3–4 months to a BR2 project. Buildaway runs those in parallel and gives you a realistic combined timeline up front.
Do I need planning permission for an extension in Keston?
Sometimes yes, sometimes no. In Keston, permitted development can cover a modest rear extension, but Bromley Council takes a close view on anything altering the street elevation, and heritage designation around Keston Mark and Hayes Common removes the easy route. Buildaway checks planning, party-wall and freeholder position together.
What types of extension do you offer in Keston?
We handle single-storey, side-return, wrap-around, double-storey and basement extensions throughout Keston. The right answer for your BR2 property depends on drainage, boundary and Bromley Council policy. Buildaway establishes those before proposing anything.
Do Buildaway handle both design and construction for Keston extensions?
Both, on one contract. For Keston clients Buildaway handles drawings, structural engineering, consents and construction. Splitting design from build is where BR2 extension projects most often lose money, because the gap between them is nobody's problem until it is yours.
Are your extension specialists local to Keston?
Buildaway covers Keston and the wider BR2 area year-round. Having extended this housing stock around Keston Mark and Hayes Common repeatedly, we know its constraints before the survey - and we are nearby well after handover.
Get Your Free Quote
Tell us about your project and we'll get back to you within 24 hours.
We Serve Keston and Surrounding Areas
Find us in the heart of Keston. 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 Keston?
Whether you're upgrading an elegant family home or elevating a luxury property, Buildaway guarantees extensions that reflect style, quality, and lasting value.