- Aston Mart World
Building work done properly — from the ground up.
Extensions, refurbishments, conversions and groundworks across South East London, North Kent and Northamptonshire.
Fixed written quotations
Building regulations handled for you
Written workmanship guarantee
Fully insured — [£X million] public liability
Registered company no. 16872571
A builder who tells you the price — and sticks to it.
Choosing a builder is about more than finding the lowest price. It is about finding a team you can trust to communicate clearly, manage the work properly and deliver what was agreed.
Every Astonmart World project starts with a free site visit and a fixed written quotation setting out the scope of work, proposed programme, materials, exclusions and payment stages.
No vague estimates. No unclear costs. No unnecessary surprises halfway through your project.
Our site operations are led by an experienced Contracts Partner, while our accounts are managed by a qualified accountant. This means your project is properly coordinated on site and professionally managed behind the scenes.
What we do for homeowners
From creating additional space to completely transforming an existing property, we provide practical building solutions tailored to your property and requirements.
Extensions & Alterations
Create more space without moving. We deliver single- and double-storey extensions, kitchen extensions, garden rooms, open-plan alterations and structural modifications, all carefully planned around your home.
Refurbishments & Conversions
Transform and modernise your property with professionally managed refurbishments and conversions, including kitchens, bathrooms, whole-house renovations, garages, basements, barns and self-contained living spaces.
Groundworks & Exterior Works
From foundations, excavation and drainage to driveways, patios and site preparation, we provide reliable groundworks and exterior services to create a strong foundation for your project.
What we do for professional clients
We also work with insurers, loss adjusters, landlords, letting agents, developers, housebuilders and main contractors.
Our professional services are structured around reliable communication, accurate pricing and properly supervised delivery.
Insurance Reinstatement
We provide responsive reinstatement services for insurers, loss adjusters and property owners following insured damage. From prompt site inspections and detailed quotations to authorised repairs, snagging and final handover, we keep projects moving while maintaining clear communication with all parties.
Subcontract Packages
We provide reliable, supervised subcontract services for housebuilders, main contractors and developers. Our capabilities include groundworks, brickwork, blockwork, carpentry and general building works, delivered with appropriate site supervision, safety procedures and clear coordination with the principal contractor.
Landlords & Letting Agents
We support landlords and letting agents with practical building, maintenance and refurbishment services to keep properties safe, functional and ready for occupation. From repairs and remedial work to kitchen and bathroom upgrades, internal alterations and void-period refurbishments, we help minimise delays and maintain property standards.
Why choose Astonmart World
Fixed Written Quotes
Every quotation is based on a proper site assessment and clearly sets out the agreed scope, labour, materials, exclusions and proposed programme.
Clear Payment Stages
Payments are linked to clearly defined project milestones, with the final payment due following completion and snagging.
Building Regulations Managed
We coordinate building control requirements, inspections and completion documentation where applicable, helping to keep the project compliant and properly documented.
One Named Contact
You will have a clear point of contact throughout your project, making it easier to ask questions, receive updates and keep track of progress.
Safety on Every Site
We take site safety seriously, using appropriate risk assessments, method statements and suitably qualified and carded operatives where required.
Workmanship Guarantee
Our work is supported by a written [X-year] workmanship guarantee, together with a defined snagging and aftercare process.
How it works
1. Free Site Visit
We visit your property to understand your requirements, assess the site, take measurements and discuss what you want to achieve.
2. Fixed Quotation
You receive a clear written quotation covering the agreed scope, exclusions, proposed programme and payment stages.
3. Professionally Managed
Once approved, the work is planned and supervised with appropriate health and safety procedures, site coordination and regular progress updates.
4. Sign-Off & Handover
Once the work is complete, we carry out snagging, coordinate the relevant building control sign-off and provide the appropriate completion documentation and certificates.
Areas We Cover
South East London and North Kent — Bromley, Orpington, Bexleyheath, Sidcup, Eltham, Lewisham, Greenwich, Croydon, Dartford, Sevenoaks, Beckenham, Petts Wood, West Wickham — and Northamptonshire and the East Midlands, including Northampton, Rushden, Wellingborough, Kettering, Towcester, Daventry, Blisworth and the Milton Keynes borders.
Planning a Project? Let's Talk It Through.
Whether you are considering an extension, refurbishment, conversion, groundwork project or property improvement, we would be happy to discuss your plans.
Tell us what you have in mind and arrange a free site visit. We aim to respond to enquiries within the same working day.