Trusted Builders in Sevenoaks, Kent
If you’re looking for experienced builders in Sevenoaks, BDC Construction delivers high-quality building work for homeowners across the Sevenoaks district and wider Kent. From house extensions and loft conversions to full renovations and new builds, we provide expert craftsmanship and a straightforward, hands-on service from first consultation to final handover.
Founded in 2011 by Ben, a builder with over 20 years’ experience, our reputation has been built almost entirely through referrals and repeat clients. We understand the unique character of properties in Sevenoaks — from period homes and listed buildings to modern family houses — and we bring the same attention to detail to every project, no matter the size.
Call us on 01622 946189 or get a free quote to discuss your project.
SERVICE SECTIONS
House Extensions & Additions in Sevenoaks
Looking to create more space in your Sevenoaks home? Whether you need a larger kitchen, an additional bedroom, or a bright open-plan living area, our team designs and builds bespoke house extensions that blend with your existing property and add genuine value.
We handle every type of extension across the Sevenoaks area — single-storey rear extensions, two-storey side extensions, wraparound designs and porch additions. With many properties in the district sitting within conservation areas or the Green Belt, we understand the planning considerations involved and can guide you through the process from day one.
Every extension we build is project-managed by Ben personally, ensuring consistent quality, clear communication and no surprises on cost or timeline.
View our extensions portfolio →
Renovations & Refurbishments in Sevenoaks
Sevenoaks is home to a wide mix of properties, from Victorian and Edwardian terraces to 1930s semis, post-war builds and large detached homes. Many of these properties have enormous potential that a well-planned renovation can unlock — whether that means reconfiguring dated layouts, modernising kitchens and bathrooms, or carrying out a complete whole-home refurbishment.
As experienced building contractors in Sevenoaks, we manage renovations of every scale. We coordinate all trades in-house, from structural alterations and steelwork through to plastering, electrics, plumbing and final decoration. Our clients regularly tell us that the process was far less disruptive than they expected — we partition living spaces, keep sites clean and communicate openly throughout.
View our renovation projects →
Loft Conversions in Sevenoaks
A loft conversion is one of the most cost-effective ways to add space and value to your Sevenoaks home — often without the need for a full planning application. We build dormer loft conversions, hip-to-gable conversions, Velux conversions and mansard designs, tailored to the property type and your specific requirements.
With property prices in the Sevenoaks district averaging over £500,000, a well-executed loft conversion can add significant value while giving you the extra bedroom, home office or bathroom your family needs. We handle everything from initial structural surveys and party wall agreements through to Building Control sign-off and final finishing.
Learn more about our loft conversion service →
Conversions & New Builds in Sevenoaks
Whether you’re converting a garage, barn or outbuilding, or starting a completely new build from the ground up, BDC Construction has the expertise to manage the full process. We take projects from groundworks and foundations through structural work, roofing, first and second fix, and right through to decoration and landscaping.
The Sevenoaks district includes everything from rural plots in villages like Ide Hill and Sundridge to larger sites on the edges of established towns. We’ve worked on conversion and new build projects across Kent and understand the local planning requirements, including the additional considerations that come with building within the Kent Downs Area of Outstanding Natural Beauty or Metropolitan Green Belt.
WHY CHOOSE BDC CONSTRUCTION IN SEVENOAKS
Why Sevenoaks Homeowners Choose BDC Construction
- 20+ years’ experience — Founded by Ben, who personally oversees every project from start to finish.
- Built on referrals — The majority of our work comes through recommendations from previous clients.
- Premium finishing standards — We don’t cut corners. Every build is completed to a standard we’re proud to put our name to.
- Clear, honest pricing — Detailed quotes with no hidden costs. We give you a realistic budget and stick to it.
- Planning guidance — We can advise on permitted development, conservation area restrictions and introduce you to trusted architects if needed.
- Fully insured — Giving you peace of mind throughout every stage of your build.
- Clean, tidy sites — We partition living spaces so you can continue your daily routine with minimal disruption.
Building in Sevenoaks — What You Need to Know
Sevenoaks is one of Kent’s most desirable districts, and with that comes specific planning and building considerations that not every contractor understands. Here’s what makes building work in Sevenoaks different:
Conservation areas — Sevenoaks District has 41 designated conservation areas, including Sevenoaks High Street, Westerham, Otford, Kemsing and many smaller villages and hamlets. If your property falls within one, you may face additional restrictions on materials, design and external alterations. We’re experienced in working within these constraints and can help ensure your project respects the character of the area while still delivering the result you want.
Green Belt and AONB — Around 60% of the Sevenoaks district lies within the Kent Downs or High Weald Areas of Outstanding Natural Beauty, and large parts fall within the Metropolitan Green Belt. This doesn’t mean you can’t extend or build — but it does mean the planning process needs to be handled carefully. We can advise on what’s achievable under permitted development and what will require a formal application to Sevenoaks District Council.
Listed buildings — The district contains hundreds of listed buildings. If you’re planning alterations to a listed property, you’ll need Listed Building Consent in addition to any standard planning permission. We have experience working sensitively with older and protected structures, using appropriate materials and techniques to preserve their character.
High property values — With average house prices in the Sevenoaks district sitting above £500,000, investing in quality building work makes sound financial sense. A well-built extension or loft conversion not only improves your quality of life but can add substantial value to your property.
Areas We Cover in the Sevenoaks District
We work with homeowners across the Sevenoaks district and surrounding areas, including:
Sevenoaks town centre, Riverhead, Seal, Kemsing, Otford, Sundridge, Brasted, Westerham, Edenbridge, Ide Hill, Toys Hill, Borough Green, Ightham, Plaxtol, Leigh, Chiddingstone, Penshurst, Four Elms, Chipstead, Chevening, Knockholt, Halstead, Badgers Mount and Dunton Green.
We also serve homeowners across the wider Kent area from our base in Maidstone, including Tunbridge Wells, Tonbridge, Maidstone, Medway and Ashford.
See all areas we cover → | Contact us →
Frequently Asked Questions — Building Work in Sevenoaks
How much does a house extension cost in Sevenoaks? Extension costs in Sevenoaks typically range from £35,000 to £90,000 or more, depending on the size, specification and whether the build is single or two-storey. Factors like ground conditions, proximity to boundaries, and whether the property is in a conservation area can also affect the cost. We provide detailed, itemised quotes so you know exactly what you’re paying for before any work begins.
Do I need planning permission to extend my home in Sevenoaks? Many rear and side extensions fall under permitted development rights, meaning you won’t need a formal planning application. However, if your property is in one of Sevenoaks’ 41 conservation areas, is a listed building, or if the proposed extension exceeds certain size limits, you will likely need permission from Sevenoaks District Council. We can assess your specific situation and advise on the best route forward during your free consultation.
How long does a loft conversion take in Sevenoaks? A typical loft conversion takes between 8 and 12 weeks from start to completion, depending on the type of conversion and the complexity of the structural work involved. We keep disruption to a minimum and provide a realistic timeline at the quoting stage so you can plan accordingly.
Can I build in the Green Belt near Sevenoaks? Building within the Green Belt is possible but subject to stricter planning rules. Extensions and alterations to existing homes are often permitted provided they don’t result in disproportionate additions. New builds are more restricted. We can advise on what’s realistic for your property and help you navigate the planning process.
What areas near Sevenoaks do you cover? We cover the whole Sevenoaks district including Otford, Westerham, Kemsing, Seal, Riverhead, Edenbridge, Sundridge, Borough Green and the surrounding villages. We’re based in Maidstone and work across the whole of Kent.
Are BDC Construction fully insured? Yes. We carry full public liability insurance and employer’s liability insurance, giving you complete peace of mind throughout every stage of your project.