Home Extension Builders in New Cross
Trusted local extension builders in New Cross (SE14) offering complete home extension design, planning, and construction - all handled by Buildaway.
Your Local Home Extension
Specialists in New Cross
From foundations and steels to glazing and final decoration, Buildaway runs New Cross extensions as one contract with one point of contact, coordinating structural calculations, building control inspections and the party wall process across SE14. New Cross sits within Buildaway's established SE14 area, with extension projects completed around Goldsmiths University, Fordham Park and Lewisham Way.
Across New Cross and SE14, Buildaway designs and builds extensions on Georgian and Victorian terraces, many in multi-occupancy or mid-restoration. Regular streets include New Cross Road, Queens Road and Amersham Vale, with New Cross Gate Station and Deptford High Street inside the area.
With a strong reputation for quality workmanship, Buildaway delivers extension design and construction across New Cross and the wider SE14 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 New Cross
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 New Cross Homeowners Choose Buildaway
Local teams with expertise across SE14, New Cross Road, Deptford, and South East London's growing market
Based in your area with local expertise and reputation.
Bespoke extension designs for Victorian conversions, apartments, and new-build 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 New Cross Station, Goldsmiths University, and surrounding residential areas
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.
“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
“The quality of the work, their high standards, and their professionalism, along with effective and proactive communication made a refreshing change from the builders I have used in the past ... I would without question use Buildaway again for other work.”
Michael Marks
Verified Google review
“Communication was clear and consistent both before and throughout the project, which made the whole process feel well managed ... The quality of the finish is excellent ... They stuck to the agreed timelines, and pricing was transparent throughout.”
Sean Kelleher
Verified Google review
“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
“Cormac & his team were brilliant throughout our bathroom renovation project. From scoping to completion, Cormac was always very responsive ... His team worked extremely hard and a big shoutout to Greg for his attention to detail! We couldn't be happier with the results.”
Georgina Ehmcke
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
Frequently Asked Questions
Your questions about home extensions in New Cross, answered.
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.
Do you handle drawings and building control?
Yes. Buildaway coordinates structural calculations, the building control application and inspections, and manages the party wall process where a neighbouring wall is affected, which is frequent on New Cross semi-detached properties.
Will an extension affect my neighbour?
On any semi-detached or terraced New Cross 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 you extend within Telegraph Hill?
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.
What usually drives the cost up?
Groundworks and glazing. Poor ground conditions mean deeper foundations, and large glazed openings need steel. Both are established at survey in SE14, so Buildaway prices them properly rather than provisionally.
Get Your Free Quote
Tell us about your project and we'll get back to you within 24 hours.
We Serve New Cross and Surrounding Areas
Based locally and working across New Cross and the neighbouring SE14 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 New Cross?
Buildaway combines stylish design with expert craftsmanship - enhancing property value across New Cross and South East London.