Building Britain's Finest Homes Since 1987
Bespoke new builds, heritage restorations, elegant extensions and barn conversions — crafted with uncompromising attention to detail across the South East and beyond.
Why Hartwell & Stone
They understood that this house deserved respect. Every detail was considered — from the lime mortar mix to matching the original crown mouldings.
— Caroline & Richard Ashworth, ChelmsfordWhat We Do
Bespoke New Builds
From contemporary country houses to elegant urban residences, we build homes of enduring quality.
Learn More →Extensions & Additions
From single-storey kitchen extensions with full-width bi-fold doors to substantial double-storey additions that transform your home's footprint, every project is designed to feel like a natural continuation of the original architecture.
Learn More →Listed Buildings & Heritage
Working with listed buildings, conservation areas and historic structures demands a particular reverence for the original craftsmen's work.
Learn More →Whole-House Renovations
Whether you've acquired a period property in need of sympathetic restoration or a tired 1960s house crying out for a complete reimagining, our renovation team manages every trade under one roof — structural alterations, rewiring, replumbing, plastering, joinery, decoration and landscaping.
Learn More →Heritage & Barn Conversions
We transform barns, chapels, warehouses, maltings and other characterful buildings into exceptional homes.
Learn More →Project Management
For clients who already have their design team and specialist contractors in place, we offer dedicated project management — coordinating every trade, managing the programme, controlling costs and ensuring quality standards are met at every stage.
Learn More →
The Rectory — Before & After
Victorian rectory kitchen, Billericay · £520,000 whole-house renovation
How We Work
Initial Consultation
A complimentary site visit to understand your vision, assess feasibility and discuss your aspirations for the project.
Design Development
Working with your architect or our design partners to refine plans, select materials and resolve technical details.
Planning & Approvals
We manage all planning applications, Listed Building Consent, Building Regulations and party wall agreements on your behalf.
Construction
Expert build by our directly employed teams, with fortnightly progress reports and a dedicated project manager throughout.
Handover & Aftercare
Rigorous snagging, professional clean, full documentation and our 10-year structural guarantee. We remain on hand long after completion.
Initial Consultation
A complimentary site visit to understand your vision, assess feasibility and discuss your aspirations for the project.
Design Development
Working with your architect or our design partners to refine plans, select materials and resolve technical details.
Planning & Approvals
We manage all planning applications, Listed Building Consent, Building Regulations and party wall agreements on your behalf.
Construction
Expert build by our directly employed teams, with fortnightly progress reports and a dedicated project manager throughout.
Handover & Aftercare
Rigorous snagging, professional clean, full documentation and our 10-year structural guarantee. We remain on hand long after completion.
Price Lock Guarantee
We lock your project price at design stage. No hidden costs. No surprises. Just honest, transparent pricing from day one.
Your price is locked at design sign-off — we absorb cost increases, not you.
Agreed scope means agreed price. Only client-requested changes affect the final cost.
Itemised quotations, open-book accounting, and a clear variation process if you change your mind.
Watch Our Craftsmanship
See the quality and attention to detail that goes into every Hartwell & Stone project.
Based in Essex, Working Nationwide
Our headquarters in Chelmsford places us at the heart of Essex, with easy reach across the South East. For larger commissions — typically new builds and heritage projects above £500,000 — we work nationwide by arrangement.
Current furthest project: barn conversion in the Cotswolds
View All Areas