How long does a typical home extension take?

Most single-story extensions take 8-12 weeks from start to completion, depending on size and complexity. We provide detailed timelines during our initial consultation.

Do I need planning permission for a home extension?

Many extensions fall under permitted development rights, but this depends on your property type and extension size. We help assess requirements and handle planning applications when needed.

Are you fully licensed and insured?

Yes, we are fully licensed with £2 million public liability insurance. All our tradespeople are qualified professionals and members of relevant trade associations.

Victorian & Edwardian Restorations Kensington W8

The Restoration Specialists

Why Kensington Properties Demand a Different Standard

Kensington's tree-lined streets hold some of London's most magnificent Victorian and Edwardian properties — grand stucco facades, soaring ceilings, and those beautiful original sash windows that frame views of London's finest garden squares. But living in architectural splendour comes with its own unique challenges, especially when you're balancing modern comfort with heritage preservation.

Unlike newer developments, virtually every external alteration to a Kensington property requires RBKC planning consent. The Royal Borough administers more than 3,800 listed buildings and numerous conservation areas. That Victorian terrace you've just purchased? It likely requires planning permission for anything that changes its external appearance or architectural character. Our team navigates this complexity as a matter of course — getting it right first time, every time.

The Restoration Approach

Heritage Preserved. Luxury Delivered.

Three principles guide every Kensington project we undertake — balancing the irreplaceable character of period architecture with the standards of contemporary luxury living.

Original Fabric Preservation

We treat original cornicing, sash window joinery, and decorative plasterwork as irreplaceable assets. Our craftspeople are trained in traditional lime-mortar techniques, hand-finished renders, and period timber conservation — skills that simply cannot be replicated by modern machine methods. Where repairs are needed, reclaimed or bespoke-matched materials are sourced to maintain architectural authenticity.

Discreet Modern Integration

Twenty-first century comfort does not require visible technology. We conceal underfloor heating within period-appropriate screeds, route smart-home cabling invisibly through original voids, and integrate contemporary kitchens at rear extensions where planning consent is most attainable. The result: a home that feels entirely Victorian from the street and entirely modern from within.

Bespoke Joinery & Finishes

Every interior element — fitted libraries, kitchen cabinetry, window seats, panelling — is designed and crafted to complement the proportions of its Victorian or Edwardian setting. We work with specialist joiners who understand the difference between Doric and Ionic pilasters, and interior designers who know when to reference history and when to let contemporary restraint speak for itself.

Original Victorian sash window with slim glazing bars in Kensington heritage property, secondary glazing fitted discreetly behind — Original sash windows: beautiful, irreplaceable — and transformable with discreet secondary glazing.

The Victorian & Edwardian Challenge

Victorian and Edwardian properties were built for a different era. They're draughty, acoustically transparent, and thermally inefficient by modern standards. Original single-glazed sash windows are beautiful but allow heat to escape and noise to flood in — particularly problematic if you're near High Street Kensington or backing onto Cromwell Road.

Traditional solutions like replacement double glazing are almost always refused by conservation officers because they alter window proportions and sightlines. Modern uPVC units look jarring in heritage properties, and even timber double-glazed replacements typically require thicker frames that compromise the elegant slim profiles of original Georgian bars.

This is where many homeowners hit a wall. You want to preserve the architectural integrity that drew you to Kensington in the first place — but you don't want to spend a fortune on heating while listening to traffic noise all evening. We resolve this dilemma on every project we undertake.

Restored Victorian drawing room in Kensington townhouse showing original plasterwork cornicing and bespoke joinery — Restored Victorian reception room: original cornicing, bespoke joinery, and period proportions preserved throughout.

Modern Interventions That Work

Beyond windows, successful Kensington restorations find clever ways to add contemporary functionality without compromising period character. Our integrated approach typically includes:

Discreet building services — Underfloor heating driven by modern heat pumps. Concealed speaker and lighting systems. Smart home integration with no surface-mounted boxes disrupting your plasterwork.
Reconfigured layouts — Victorian houses were built with servants' quarters and formal reception rooms. Modern families need open-plan kitchen-dining spaces and en-suite bathrooms. We make these changes where planners most readily accept them.
Basement excavations — Where ceiling heights allow and structural conditions permit, many Kensington homeowners excavate beneath their properties to create additional living space, home cinemas, wine cellars, or gym facilities. These projects start around £500,000 and require detailed party wall and structural engineering expertise.
Kitchen and bathroom upgrades — Marble worktops, aged brass taps, and traditional bathroom fittings that complement Victorian proportions rather than clash with them.

Modern luxury basement living space beneath Kensington Victorian townhouse showing high-end contemporary design — Basement excavations unlock substantial additional living space beneath Kensington's grand terraced properties.

The Conservation Edge

Navigating RBKC Planning Restrictions

Our planning expertise is not a secondary skill — it is the foundation upon which every successful Kensington restoration is built.

RBKC Conservation Area Controls

The Royal Borough administers more than 3,800 listed buildings and numerous conservation areas covering virtually all of W8 and SW7. Any external alteration — from painting brickwork to replacing a fanlight — requires formal consent. Our planning team has navigated dozens of RBKC applications and maintains established relationships with conservation officers.

Listed Building Consent

Grade I and Grade II* listings demand a Heritage Statement with every application. We prepare these in-house, ensuring accurate historical evidence and a compelling argument for proposed works. Mis-managed applications cost months of delay; ours are typically approved at first submission.

The Secondary Glazing Advantage

Replacing original sash windows is almost always refused in conservation areas. The approved solution is secondary glazing: a discreet internal system that delivers double-glazing acoustic and thermal performance without altering the listed facade. We specify and coordinate this as a standard element of our Kensington restoration packages.

Specialist Recommendation

Preserve Your Heritage Without the Cold

Discreet secondary glazing is the only approved solution for thermally and acoustically upgrading listed sash windows in W8 and SW7. Our partners at Secondary Glazing Specialist provide invisible acoustic insulation — slimline laminated units that reduce noise by up to 70% and heat loss by 60%, fully reversible and conservation-officer approved.

Explore Heritage Glazing Solutions

Noise reduced by up to 70%

Heat loss reduced by 60%

No alteration to listed facade

Planning approval not required

Fully reversible installation

Budget & Timeline

Investment Realities for Kensington Restorations

Quality Kensington restoration costs reflect the complexity of heritage work and the premium materials required.

Cosmetic Upgrades

£650–£1,100 /m²

Redecoration, kitchen refresh, bathroom modernisation, secondary glazing installation.

Full Renovation

£1,100–£2,000 /m²

Rewiring, replumbing, structural reconfiguration, and all building services replacement.

Comprehensive

£2,000+ /m²

Structural work, basement excavation, party wall engineering, and full systems upgrade.

Timeline Expectations

Light Refurbishment3–6 months

Comprehensive Renovation6–12 months

Structural / Basement12–18+ months

Extended timelines reflect heritage reality: materials are specially sourced, traditional techniques take longer, and planning consultations involve statutory periods. The outcome is a home that retains its architectural significance while functioning beautifully for modern life.

Expert Spotlight

From Our Journal

Kensington Victorian townhouse — Heritage Restoration Guide

Heritage · Kensington

The Kensington Restoration Guide: Modernising Victorian & Edwardian Grandeur

A comprehensive guide to navigating RBKC planning, secondary glazing solutions, cost realities, and the specialist team requirements for period property restoration in W8 and SW7.

Read the Full Guide

Confidential Enquiry

Discuss Your Kensington Project

Every successful Kensington restoration begins with a thorough site survey and an honest conversation about your ambitions, constraints, and budget. We provide this initial consultation at no charge — and all discussions are treated in the strictest confidence.

Free initial site survey

In-house planning & heritage expertise

RBKC conservation area specialists

Integrated secondary glazing coordination

Transparent, itemised quotations

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Preserving W8's Heritage: Modernising Kensington's Iconic Grandeur