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Business Details
26 Years
experience
Expert Construction Services in East Sussex
Rexstone Builders is a family-run building firm established in 2000 near Uckfield, East Sussex. We operate across East Sussex and Kent, collaborating with experienced professionals to deliver refurbishments, conversions, new builds, and extensions to the highest standards. Our full management service coordinates with architects, clients, and contractors to ensure timely, budget-conscious completion with premium finishes. We prioritise exceptional organisation, professionalism, and customer communication. Specialising in bespoke design-led projects, we achieved recognition as Finalists in the British Home Best Extension award 2018 and the George Clarke Medal 2018.

Our Passivhaus-certified expertise, featured on the Passivhaus Trust website, underscores our commitment to sustainable, ultra-low-energy buildings. As one of nine exemplars in Grand Designs magazine, we combine decades of experience with craftsmanship to deliver outstanding results. Our reputation, built through word-of-mouth referrals, continues to grow through innovative projects and client satisfaction.
Services
New Builds Extensions Refurbishments Passivhaus Construction Project Management
Details
  • Year established: 2000
Highlights and features
  • Family-run with 23 years of local expertise in East Sussex and Kent
  • Specialists in Passivhaus-certified ultra-low-energy buildings
  • Award-winning designs recognised by British Home and George Clarke Medal
  • Full project management from concept to completion
  • Commitment to sustainability and precision in every build
Associations and certifications
  • Passivhaus Institute
What people say
Award-winning designs Passivhaus certified expertise Excellent communication Award finalists Sustainable building practices
Services
New Builds
We deliver custom-designed new builds across East Sussex and Kent, combining innovative architecture with sustainable materials. Our process ensures compliance with planning regulations while prioritising energy efficiency and client vision. Each project benefits from our Passivhaus expertise and award-winning craftsmanship.
Extensions
Our extensions enhance property functionality and value, adhering to strict quality standards. We manage structural integrity, design integration, and regulatory approvals, ensuring seamless transitions between old and new spaces. Clients receive tailored solutions aligned with their lifestyle needs.
Refurbishments
We revitalise existing structures through comprehensive refurbishments, preserving historical features while modernising interiors. Our approach balances aesthetic appeal with practical upgrades, including energy-efficient systems and contemporary finishes, ensuring longevity and comfort.
Passivhaus Construction
As Passivhaus-certified specialists, we construct ultra-low-energy buildings that meet rigorous environmental standards. Our designs optimise insulation, airtightness, and thermal efficiency, reducing energy consumption without compromising comfort or architectural integrity.
Project Management
We oversee all project phases, from initial planning to final delivery, liaising with architects, contractors, and clients. Our systematic approach guarantees adherence to timelines, budgets, and quality benchmarks, minimising stress for stakeholders.
Questions
What is Rexstone Builders' speciality?
We specialise in high-quality new builds, extensions, refurbishments, and Passivhaus-certified sustainable buildings across East Sussex and Kent.
Are Rexstone Builders experienced in sustainable construction?
Yes, we are one of the few firms in East Sussex with Passivhaus-certified expertise, prioritising ultra-low-energy designs.
Which areas do you serve?
We operate throughout East Sussex and Kent, delivering projects tailored to local architectural and environmental needs.
How do you manage construction projects?
We provide full project management, coordinating with architects, clients, and contractors to ensure timely, budget-conscious completion.
Have your projects won awards?
Yes, our Box Wing House was a Finalist in the British Home Best Extension award 2018 and the George Clarke Medal 2018.