We have been in the building trade for over 25 years, we are a professional building company specialising in New Builds, Extensions and Loft conversions & renovations in London, Hertfordshire & the surrounding areas. The majority of our work is through personal recommendations. We are always happy to show previous work. We consult with Architects, Surveyors, Quantity Surveyors, M&E Engineers and the council on your behalf so the project runs as smoothly and stress free as possible. Extensions Loft Conversions, New Builds, Bespoke Garden Rooms, House conversions/ Renovations, Refurbishments Roofing, Artificial Grass.
We also specialise in transforming office space into liveable properties.

Trades offered

Builder general
General extension
Loft conversions
Roofing general
House Builder
New build
Custom/Self Build
Garden rooms
Disabled/elderly home adaptation
Accessible Kitchens
Accessible Bathrooms

Case studies

Full house renovation, Side rear double Extension & Loft Conversion

  • 15 Jan 2020

New House Build

  • 16 Mar 2018

See more case studies

Customer testimonials

15 Jan 2020

Contracting for building work is scary as well as being a massive financial commitment. Nikki & Lee came highly recommended and quite rightly so. From day one on a cold mid-January, Lee's project management meant that the tradesmen and materials all arrived like clockwork. He put our minds at rest over any concerns and always responded quickly to texts (even late at night, sorry Lee!) Lee and Nikki have a great team around them as they worked really hard to get us warm and cosy again. We are so delighted with the end result and would recommend Assured Builders to anyone. Note: Genuine customer, more than happy to show their work if you'd like to pass by. - L.H