Looking for an extension or loft conversion in Surrey, South West London or the Home Counties? We create beautiful living spaces and add value to our client’s properties. Our expertise includes all types of lofts and extensions, please let us share our knowledge, creativity and good practical sense for your home.

Loft Conversions

Click on a property type for more info about our Loft Conversions


Click on a property type for more info about our incredible extensions

Welcome to A1

We provide unparalleled expertise in loft conversions, extensions and refurbishments, committed to providing our customers with the highest level of service and construction possible and an extensive portfolio of satisfied clients reflects our dedication in providing a first class service.

We build bespoke extensions and loft conversions in Surrey, Hampshire, the home counties, London, Windsor and other areas across the region.

Contact us today for a FREE expert advisory meeting and FREE quote!

Benefits of a Loft Conversion or Extension

With high quality loft conversions or house extensions, you can increase the value of your home as well as improve your living space. As one of the UK’s most popular forms of home improvement, loft conversions and house extensions can make wasted space practical and by installing loft insulation you can reduce your energy bills too.

With rising house prices, increased Stamp Duty and higher moving costs, a loft conversion or extension could also have a number of financial benefits, including providing a space for rental income.

There are also so many potential eco-friendly options to a loft conversion:

Solar Panels which can lower or even eliminate your monthly electricity bills.

Insulation and Ventilation: for our eco-lofts we provide the options of ‘Vacuum Insulation Panels’ and ‘Mechanical Ventilation with Heat Recovery’.

Under Floor Heating: As under-floor heating is economical with the most efficient types being water and electrical, it can easily be linked into a solar panel if you wish.

Green Roofs: Green/Living roofs have the capability of introducing a whole range of plant species from mosses, ferns, orchids, tropical plant species, sedums, herbs and edible plants grown organically.

Water Harvesting: Rainwater harvesting can cut the amount of water that a home uses from their water supplier by up to 50%.

Contact us today to find out how a loft conversion can improve your home!

Why A1?

  • Almost 20 years of building and project management operations
  • >90% of our clients recommend us to family and friends
  • The majority of our work comes through customer referrals
  • Show homes to visit, unescorted
  • Extensions and loft conversions throughout the region
  • Your money is safe with the A1 secure payment process
  • Customer Service is our number 1 priority – we take you step by step through your project giving you complete transparency of operations and ultimate control throughout, managing each project from start to finish
  • Choice – From a variety of services to the whole package – it’s your choice. We interpret your ideas, advise on the best solution and create your dream loft or extension
  • Superior Design – our experienced loft designers will work with you to provide innovative solutions for your space and design
  • We provide comprehensive 10 year company backed guarantees as standard to all our clients at the time of contract, for your complete peace of mind.
  • BOPAS, CHAS, Construction Line and SafeContractor certified company: The Construction (Design Management) Regulations 2015 and ISO 9001 compliant.


The A1 Team have a vast array of previous clients right across Surrey, South West London, Berkshire including Bromley, Kingston, Windsor, and across the region.

From Hip to Gable’s in Hampton Court & Guildford; Mansard’s in Malden; Velux’s in Virginia Water & Rear Dormer’s in Richmond & The Dittons.

Contact us today for your FREE advisory meeting and FREE quote.