Where Heritage Architecture Meets Modern Precision.

From grand Georgian villas to refined modern residences, we deliver seamless transformations with uncompromising quality.

EXT House Extensions Highgate

EXT is a specialist construction and renovation company focused on high-end house extensions and full property transformations in Highgate. We work with homeowners who value architectural integrity, refined detailing, and a discreet, well-managed building process. Highgate is unlike any other part of London. Its grand Georgian and Victorian residences, combined with iconic modernist architecture, demand a level of sensitivity, experience, and precision that goes far beyond standard residential construction. Our role is not simply to build — but to enhance, preserve, and elevate. From carefully designed rear and side extensions to full internal refurbishments, loft conversions, and structural works, we deliver spaces that feel natural to the original property while meeting the expectations of modern, high-end living. Every project is managed with clarity, professionalism, and absolute respect for the surrounding environment.

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Let’s Shape Your Home, Properly.

Book a private consultation with our Highgate specialists today.

Comprehensive Construction & Renovation Services in Highgate

Our services are designed to support complex, high-value residential projects in Highgate, where architectural character, planning sensitivity, and build quality are essential. Each service integrates seamlessly with the others, allowing us to deliver cohesive, beautifully executed transformations.

House Refurbishment

Complete internal and external refurbishments that enhance layout, light, and functionality while preserving the architectural soul of your Highgate home.

House Extensions

Bespoke rear, side, and wraparound extensions designed to expand living space without disrupting the original proportions or character of the property.

Loft Conversions

Elegant loft conversions that create calm, light-filled spaces while respecting rooflines, structural integrity, and conservation considerations.

Kitchen Refurbishment

High-end kitchen renovations combining bespoke cabinetry, refined finishes, and intelligent layouts tailored to modern family living.

Kitchen Extensions

Architecturally considered kitchen extensions that seamlessly connect interior spaces with gardens, terraces, and outdoor living areas.

Bathroom Refurbishment

Luxury bathroom transformations focused on proportion, materials, and craftsmanship to create private, spa-like environments.

Flooring & Tiling

Precision-installed flooring and tiling using premium materials, selected to complement both period features and contemporary interiors.

Carpentry & Joinery

Bespoke joinery solutions including staircases, cabinetry, doors, and detailed finishes crafted specifically for your property.

Plastering & Decorating

Flawless plasterwork and refined decorative finishes that bring cohesion, elegance, and longevity to every interior space.

Roofing

Structural and cosmetic roofing works delivered with sensitivity to traditional forms and modern performance standards.

Structural Works

Complex structural alterations, steel installations, and load-bearing modifications carried out with precision and full compliance.

Steel Supply & Installation

Supply and installation of structural steelwork, integrated seamlessly into complex renovations and extension projects.

Selected Projects in Highgate & North London

A curated selection of house extensions, refurbishments, and architectural transformations completed for discerning homeowners.

A Refined, Fully Managed Building Process

We understand that high-value properties require not only excellent craftsmanship, but also exceptional organisation, discretion, and communication. Our process is designed to remove uncertainty, protect your investment, and deliver outstanding results with minimal disruption.

Consultation, Vision & Architectural Insight

Every project begins with a detailed consultation focused on your lifestyle, long-term plans, and the architectural character of your Highgate home. We assess the property, discuss opportunities and constraints, and provide early technical and structural guidance aligned with planning and conservation expectations.

Design Coordination & Technical Planning

We collaborate closely with architects, designers, and engineers to translate vision into a build-ready solution. At this stage we refine layouts, structural strategy, materials, and construction methodology to ensure precision, compliance, and seamless execution.

Construction & Craftsmanship Delivery

Our experienced team manages the entire build process with discretion and care. Structural works, extensions, and internal transformations are delivered with exceptional attention to detail, coordinated trades, and respect for neighbouring properties and daily life.

Final Finishes, Inspection & Handover

We complete all bespoke finishes, carry out thorough quality inspections, and prepare your home for handover. The result is a refined, cohesive space delivered to the highest standard, with full documentation and ongoing support. Why Homeowners Choose SHAPE EXT in Highgate

What Our Clients Say

SHAPE EXT delivered an extension that feels completely natural to our home. The quality of work and professionalism throughout were exceptional.

Their understanding of Highgate architecture gave us confidence from day one. The result is elegant, functional, and beautifully executed.

Discreet, organised, and highly skilled. The project ran smoothly and the final finish exceeded our expectations.