
Bexleyheath · Rated 4.7 on Google
Wraparound and rearextensionsin Bexleyheath
Bexleyheath properties often have the side return and rear garden depth that make a wraparound extension transform the ground floor: and we design, draw and build it under one contract.
Written, itemised estimate after a survey, no obligation to proceed.
30 yearsof construction experience across the team
CABE membersprincipals are members of the Chartered Association of Building Engineers
4.7 starsrated 4.7 from 14 Google reviews
One point of contactdesign, planning, procurement, build and supervision managed in-house
Building in Bexleyheath
We work in Bexleyheath, and we know its houses
Bexleyheath is a short drive from our office at Onega House, 112 Main Road, Sidcup, DA14 6NE, and it is one of the areas we work in most consistently. Surveys and site visits are arranged Monday to Friday, 8am to 5pm.
The housing here is largely inter-war and post-war semi-detached and detached, with generous plots by London standards: a side return down one flank and enough rear garden depth to extend without swallowing the whole outside space. That combination is what makes wraparound extensions genuinely worthwhile here rather than merely possible.
Because the plots allow it, we also see more double-storey work in Bexleyheath than in the tighter terraced areas: a bedroom and bathroom above a new ground-floor room, which brings foundation depth, party wall matters and the tie-in to the existing roof into the design.
Common requests are wraparound and large rear extensions with roof lanterns and bi-folds, double-storey extensions, loft conversions with rear dormers, garden rooms and home offices at the end of longer gardens, and full refurbishment of houses that have not been touched since the 1980s.
We design wraparound extensions around light and flow, not just floor area: roof lanterns, glazing lines and the position of the kitchen island decide whether the finished space actually gets used.
Every Bexleyheath project runs through the same five stages: design, planning and preparation, procurement, construction and project supervision, all managed in-house by a team with 30 years of experience, with principals who are members of the Chartered Association of Building Engineers. You can request an estimate or read more about how we work.
Get an estimate in Bexleyheath
Send us the details and we'll be in touch during working hours, Mon–Fri, 8am–5pm.
Services in Bexleyheath
What we build in Bexleyheath

Home Extensions
Single-storey, double-storey and wraparound extensions designed, drawn and built by one team.
Home extensions in Bexleyheath
Loft Conversions
Turn unused roof space into a bedroom, en-suite or office, structurally sound and building-control signed off.
Loft conversions in Bexleyheath
New Build Homes
Individual new build homes delivered from design package through to completion.
New build homes in Bexleyheath
Full Refurbishments & Renovations
Whole-house refurbishment, kitchens, bathrooms and period property renovation, managed end to end.
Refurbishments & renovations in Bexleyheath
Internal Alterations
Knock-throughs, new openings, reconfigured layouts and structural steels installed safely.
Internal alterations in Bexleyheath
Outbuildings & Garden Rooms
Insulated garden rooms, home offices, gyms and garages built to last all year.
Outbuildings in Bexleyheath
Architectural Drawings & Design Packages
Survey, concept, planning and construction drawings produced in-house, ready to build from.
Drawings & design in Bexleyheath
Structural Works
Steels, foundations, load-bearing alterations and structural repairs.
Structural works in Bexleyheath
Carpentry & Joinery
First and second fix carpentry, roof structures, staircases and fitted joinery.
Carpentry in Bexleyheath
Brickwork
Extensions, garden walls, repointing and matched brickwork on period properties.
Brickwork in Bexleyheath
Roofing
Pitched and flat roofing, dormers, leadwork and roof coverings on new and existing homes.
Roofing in Bexleyheath
Electrical, Plumbing & Gas
Coordinated through vetted, accredited subcontractors: NICEIC/NAPIT registered electricians and Gas Safe engineers.
Electrical & plumbing in BexleyheathWhy Ashcroft
Why homeowners in Bexleyheath choose us
Close to the work
Our Sidcup office is a short drive from Bexleyheath, so surveys, design meetings and site presence are straightforward.
Design for light and flow, not just area
Glazing lines, lanterns and the position of the island are designed deliberately, because they decide whether the finished space actually gets used.
30 years of experience
30 years of construction experience across the team on residential extension and refurbishment work.
CABE-member principals
Structural design and building regulations compliance sit with principals who are members of the Chartered Association of Building Engineers.
Rated 4.7 on Google
4.7 stars from 14 Google reviews, built on communication, detail and delivery.
One contract, one programme
Drawings, planning, procurement, construction and supervision are all handled in-house, which matters on larger wraparound builds.
Local property issues
What we typically find on Bexleyheath properties
Large open-plan spans need real structure
Wraparound extensions remove a lot of the original rear and side walls at once. The steel frame carrying that has to be designed and its bearings checked, not sized by rule of thumb.
Flat roofs over big footprints
A wide wraparound roof needs designed falls and correctly positioned outlets. Ponding is the single most common cause of a leak on this kind of roof.
Overheating from too much glass
Bi-folds, sliders and a lantern on a south-facing rear elevation can make a kitchen unusable in summer. Glazing extent and specification are set against orientation for that reason.
Boundary building and drainage
Extending to the boundary brings party wall procedures, eaves overhang and rainwater disposal into play, and existing drain runs frequently cross the new footprint.
None of this is unusual, and none of it is a reason not to build. It is the reason we survey before we design and design before we price, so what turns up in Bexleyheath is in the estimate rather than in a mid-build conversation about extra cost.
How it works
Five stages, all managed in-house
- 01
Design
We take your brief, survey the property and produce the drawings and design package in-house, no separate architect to appoint.
- 02
Planning & preparation
Applications, building control and the programme of works are prepared and coordinated before anyone lifts a tool.
- 03
Procurement
Materials and vetted trades are secured against a fixed scope, so the build starts with everything in place.
- 04
Construction
Your build is delivered by skilled tradesmen working to the agreed drawings, programme and standard.
- 05
Project supervision
A named point of contact supervises the site, handles building control and keeps you updated to completion.
Bexleyheath questions
Frequently asked questions
Do you cover Bexleyheath?
Yes. Bexleyheath is one of our regular areas, worked from our Sidcup office at Onega House, 112 Main Road, DA14 6NE.
How soon can you visit?
Surveys are arranged during working hours, Monday to Friday, 8am to 5pm, and Bexleyheath is a short drive from our office.
What does a wraparound extension cost in Bexleyheath?
It depends on footprint, ground conditions, the amount of structural steel, glazing specification and the kitchen inside it. We survey and issue an itemised written estimate.
Will a wraparound need planning permission?
Usually yes, wraparound extensions typically fall outside permitted development. We assess your property and confirm the route before anything is priced.
Can you do a double-storey extension?
Yes. Two-storey work is designed in-house, including foundation depth, the tie-in to the existing roof and any party wall requirements.
How long will the build take?
Design and the planning route come first, then construction. You get a written programme for your specific project with the estimate rather than a generic timescale.
Do you offer emergency call-outs?
No. We deliver planned design-and-build projects, not emergency repairs.
Which nearby areas do you cover?
Welling, Bexley, Crayford, Blackfen, Sidcup, Dartford and the wider Kent and South East London area.
Rated 4.7 from 14 reviews
What our clients say
“Adam, Robbie and the team were fantastic delivering our kitchen extension and bathroom, great communication throughout and happy to adjust the design as we went.”
“Adam and Rob's team did an amazing job on our extension, from start to finish they made the process straightforward and painless.”
“Professional, friendly and did a wonderful job creating a new opening between rooms in our Victorian home. Adam communicated clearly throughout. Highly recommend.”
Coverage
Areas near Bexleyheath we also serve
Alongside Bexleyheath we work across Welling, Bexley, Crayford, Blackfen and the wider Kent and South East London area from our office at Onega House, 112 Main Road, Sidcup, Kent, DA14 6NE. If you are not sure whether your postcode is covered, contact our Sidcup builders and we will tell you straight away. You can also see examples of our work or start from our home page.

Planning work in Bexleyheath?
Tell us about the property and what you want to achieve, or call 07834 989360.
