Secondary Glazing Specialists in Kensington
Secondary Glazing for Kensington's Grand Terraces & Mansion Flats
Kensington's sweeping stucco terraces, red-brick mansion flats and garden squares represent some of London's finest Victorian and Edwardian architecture. We have spent decades working with Kensington homeowners, managing agents and conservation officers to install bespoke secondary glazing that meets the exacting standards of the Royal Borough — without compromising a single original feature.
380+
Projects Completed
600+
Listed Buildings Served
14
Conservation Areas
Working in Kensington
The Royal Borough of Kensington and Chelsea maintains some of London's most rigorous conservation area policies. Our team holds specialist accreditations covering all listed building classifications prevalent in Kensington, from Grade II terraced houses to Grade I mansion blocks.
Request a Survey- Stucco Terrace
- Mansion Flat
- Mews House
- Garden Square Villa
- Edwardian Conversion
What We Solve in Kensington
Period Sash Windows
Kensington's Victorian sash windows require slimline secondary units that sit discreetly within the existing box frame, preserving the original weights, pulleys and glazing bars.
Conservation Officer Liaison
We manage the full listed building consent process on your behalf, working directly with RBKC's conservation team to ensure compliance before installation begins.
Traffic Noise on Busy Roads
Properties on Cromwell Road, Kensington High Street and the A4 benefit from our 10.8mm acoustic laminate specification, achieving up to 54dB sound reduction.
Planning Secondary Glazing in Kensington
Services
- Secondary glazing for listed buildings
Reversible, consent-friendly installations for listed and conservation-area homes.
- Secondary glazing for sash windows
Vertical sliders that match original sash proportions and keep the box frame intact.
- Acoustic window inserts
Laminated acoustic glass and wide cavities for traffic, rail and flightpath noise.
From the Journal
- Acoustic ScienceWhat Thickness of Acoustic Glass Do You Need for Secondary Glazing?
4mm, 6mm or 10.8mm laminate? Match the glass thickness, PVB interlayer and air gap to the noise you're actually fighting.
- Technical GuideSecondary or Double Glazing? A Building Physicist's Verdict on Noise and Heat
A comprehensive comparison of secondary glazing and double glazing for noise reduction, thermal performance, cost, and suitability for different property types.
- Acoustic ScienceSoundproof Secondary Glazing: Everything You Need to Know
Why double glazing fails against traffic noise — and how a wide air gap plus acoustic glass delivers up to 54dB.
Secondary Glazing Across Central London
Secondary Glazing Kensington: Listed Building Specialists
380+ installations completed in Kensington. Kensington's sweeping stucco terraces, red-brick mansion flats and garden squares represent some of London's finest Victorian and Edwardian architecture. We have spent decades working with Kensington homeowners, managing agents and conservation officers to install bespoke secondary glazing that meets the exacting standards of the Royal Borough — without compromising a single original feature.
Kensington Homes, Streets and Noise: What We See on Survey
Kensington's housing is dominated by the stucco-fronted Italianate terraces built in the mid-Victorian boom: Queen's Gate, Onslow Gardens, Pembridge Square and the garden squares of Notting Hill. These houses have tall sash windows on the first-floor piano nobile, often with working internal shutters and deep panelled reveals, which give room for a generous acoustic air gap. Older Georgian houses survive around Kensington Square and Edwardes Square, with smaller sashes and thinner reveals, while the red-brick mansion blocks of Kensington Court and Earl's Court have large bay windows that usually need three or four separate secondary units.
Noise is heaviest along the Cromwell Road and the A4 Talgarth Road, which carry traffic towards the M4 day and night, and on Kensington High Street and Holland Park Avenue, where buses run late. Flats near Earl's Court and West Brompton also hear the District line and the West London Line. For these frontages we specify acoustic laminate with the widest gap the reveal will take. Rear rooms facing communal gardens are usually far quieter, so standard 4mm or 6.4mm glass is normally enough there and keeps the cost down.
Most Kensington homes sit in one of the Royal Borough's conservation areas, and many are listed. Because secondary glazing is fitted inside and leaves the original sashes untouched, it is the approach the council's conservation officers generally prefer. Where a building is listed we supply drawings and a method statement for consent, and in leasehold mansion blocks we prepare the same pack for the managing agent before fitting.
Why Choose Us for Kensington Secondary Glazing
Call 020 7060 1572 for a free heritage window survey in Kensington.
Helpful Secondary Glazing Guides
Planning a project in Kensington? These guides answer the most common questions before your survey:
- Secondary glazing: the complete guide
- Types of secondary glazing compared
- Do I need planning permission for secondary glazing?
- How much does secondary glazing cost? 2026 prices
- Secondary glazing for listed buildings: complete guide
- Why 10.8mm acoustic laminate glass is the gold standard
- Browse all secondary glazing guides →
Specialist Solutions for Kensington Homes
Whatever your windows or your priority, we have a dedicated Kensington solution:
- Sash window secondary glazing — discreet units for Kensington's period sashes
- Bay window secondary glazing — bespoke systems for angled and curved bays
- Noise reduction glazing — up to 80% quieter, ideal for busy Kensington streets
- Secondary glazing for listed buildings — reversible, consent-friendly installations
- Secondary glazing cost guide — transparent pricing for your Kensington project
- Secondary vs double glazing — which is right for a Kensington period home
- Commercial secondary glazing — schools, hotels, offices and churches in Kensington
- Secondary glazing across London — how we serve heritage homes capital-wide