Home Extension Builders in Penge
Professional home extensions across Penge (SE20), from design and drawings to build and sign-off - all managed by Buildaway.
Your Local Home Extension
Specialists in Penge
Glazing lead times and steel fabrication set the real programme on a SE20 extension, not the brickwork. Buildaway separates the design and consent period from the build period on the programme so the timeline you are given is the one that happens. Buildaway's SE20 work runs from Penge High Street across to Alexandra Nurseries, taking in the properties along Maple Road and Kenilworth Road.
Extension work in Penge spans SE20 for Buildaway, covering Crystal Palace Park, the properties off Croydon Road, and the houses backing onto Alexandra Nurseries.
With a strong reputation for quality workmanship, Buildaway delivers extension design and construction across Penge and the wider SE20 area. Whether adding a single-storey rear extension or a double-storey addition, we explain the build cost and programme clearly and deliver structurally sound, well-finished results.
Our Home Extension Packages in Penge
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 Penge Homeowners Choose Buildaway
Local teams with expertise across SE20, Crystal Palace, Beckenham, and South East London
Based in your area with local expertise and reputation.
Bespoke extension designs for period conversions, modern apartments, and new developments
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 ensuring seamless, high-quality results
Meticulous craftsmanship in every aspect of your extension.
Completed projects near Penge High Street, Crystal Palace Park, and surrounding neighbourhoods
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.
What Our Clients Say
Real reviews from our satisfied customers.
“In half an hour he was at the door ... he listened and then checked, measured and said to me it is doable. Cormac is very good with communication, listening, advising, a hard worker and an excellent team leader. I am extremely impressed, happy and proud of what his team delivered.”
Betty Lwanga
Verified Google review
“From my first contact with Cormac, I was in good hands. His team turned my vision into reality, communicating with me every step of the way and offered helpful suggestions which turned my bathroom into an oasis. I could not be happier and would highly recommend their services.”
Jackie Brown
Verified Google review
“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 ... Friendly, reliable and also competitive.”
Kiran Collier
Verified Google review
“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
Verified Google review
“It was a pleasure working with the Buildaway team to reimagine a tired old bathroom into the most attractive room in the house in just two weeks. Cormac's enthusiasm, communication, and project management are top-notch ... Greg's attention to detail elevated both the experience and the result.”
Kane Dempsey
Verified Google review
“The first time I met Cormac, I knew that he is a professional, everything explained in detail ... In the end, he didn't let me down. I was very impressed with his work.”
Seow Khor
Verified Google review
Frequently Asked Questions
Your questions about home extensions in Penge, answered.
What is a build-over agreement and will I need one?
If the extension crosses a public sewer you need written consent from the water authority before building over it. It is common in Penge because of how rear drainage runs. The application takes several weeks, so Buildaway starts it at design stage rather than letting it delay the build.
Will an extension affect my neighbour?
On any semi-detached or terraced Penge property the Party Wall Act applies and notice must be served. Buildaway handles the notices and statutory periods, and factors them into the start date rather than discovering them mid-project.
Can I stay in the house during the build?
Usually yes for a single-storey rear extension, since the existing structure stays sealed until late in the programme. Buildaway phases the Penge work so the opening-up happens over the shortest practical period.
How long does a rear extension take to build?
A single-storey rear extension is generally ten to fourteen weeks on site once foundations start, depending on glazing lead times. Double-storey work runs longer. Buildaway separates the design and consent period from the build period on the programme so expectations are realistic.
Can you extend within Alexandra Cottages?
Sometimes, but the tests are stricter and additions are assessed against the original dwelling rather than its current size. Buildaway will tell you honestly at survey stage whether a scheme is likely to succeed before you spend money on drawings.
Get Your Free Quote
Tell us about your project and we'll get back to you within 24 hours.
We Serve Penge and Surrounding Areas
Based locally and working across Penge and the neighbouring SE20 streets every week.
Nearby Areas We Serve
Below are some of the local areas where you can find Buildaway transforming homes.
Ready to Transform Your Extension in Penge?
Buildaway combines stylish design with expert craftsmanship - enhancing property value across Penge, Crystal Palace, and South East London.