Trusted Local Builders

Leadway Developments & Construction are specialist builders based in Bexley and Sidcup.
We deliver home extensions, loft conversions, garage conversions and full home renovations for homeowners across Bexley, Sidcup, Bexleyheath, Welling, Chislehurst, Eltham, Crayford and Dartford.
Every project is managed in-house from initial plans through to final handover. No subcontractors. No surprises.
Just a skilled local team that takes your home seriously.
With 30 years of experience and over 200 verified 5-star reviews, we are one of the most trusted building companies in the area.
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​Our Services
 
Home Extensions















A well-planned home extension is one of the most effective ways to add space and value to your property.
We design and build extensions that feel like a natural part of your home, not an afterthought.
✔  Single-storey rear extensions, perfect for larger kitchens and open-plan living
✔  Double-storey extensions to add bedrooms, bathrooms or a home office
✔  Side return extensions to make the most of unused side space
Learn more about House Extensions
 
Loft Conversions
















A loft conversion is the smartest way to add a room without losing your garden. We convert lofts into bedrooms, home offices, playrooms and en-suite bathrooms, with the structure, insulation and finishing done properly so the space feels like part of the home.
✔  Dormer loft conversions
✔  Hip-to-gable conversions
✔  Velux and rooflight conversions
Learn more about our loft conversions
 
Garage Conversions














If your garage is sitting unused, a conversion can turn it into a room you will actually use every day.
Home offices, gyms, guest rooms, playrooms. We make sure the finished space is warm, bright and properly connected to the rest of the property.
✔  Full internal conversion and insulation
✔  New electrics, plumbing and plastering
✔  Seamless integration with your existing home
Find out more about our garage conversions
 
Full Home Renovations
From single-room refurbishments to whole-house transformations, we handle renovations of all sizes. Kitchen and bathroom upgrades, structural changes, open-plan reconfigurations. Whatever the scope, we manage the entire project from start to finish.
 
Why Homeowners Choose Leadway
✔  30 years of experience delivering extensions and conversions across Bexley, Sidcup and the surrounding area
✔  Over 200 verified 5-star reviews on TrustATrader, consistently rated for quality, reliability and communication
✔  No deposit required. All work billed in arrears based only on completed stages
✔  Fully in-house team. Groundworkers, bricklayers, carpenters, plasterers, plumbers and electricians, all employed
    directly by us
✔  Fully insured and compliant with all building regulations and health & safety requirements
✔  Free quotes with no obligation and no pressure
 
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How We Work
1. Free Consultation & Quote
We visit your property, listen to what you need and provide a clear, detailed quote with no obligation.
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2. Planning & Preparation
We handle building control, material sourcing and scheduling so the project runs smoothly before a single brick is laid.
 
3. The Build
Our in-house team carries out every stage of the work to a high standard, keeping disruption to a minimum while you are living in the property.
 
4. Handover
We do not consider a job finished until every detail is right. Final inspection, snagging and handover, done properly.
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Is an Extension or Conversion Right for You?
Moving house is expensive and disruptive. Extending or converting gives you the space you need, in the home you already love, at a fraction of the cost.
✔  Add space without the upheaval of moving
✔  Increase your property value with a professionally built extension or conversion
✔  Create a home that works for how you actually live
 
Get Your Free Quote Today!​
We cover Bexley, Sidcup, Bexleyheath, Welling, Chislehurst, Eltham, Crayford and Dartford. If you are ready to start your project, get in touch today.
📞 Call us at 0203 576 5639 or 07766 161063
✉️ Email us at info@leadway.co.uk
📩 Or fill out our contact form to get started today!