Secondary Glazing Specialists in the City of London
Secondary Glazing for the City's Barbican Estate, Livery Halls & Historic Residences
The Square Mile is better known for offices than homes, but it contains some of London's most distinctive residential settings — the Grade II listed Barbican and Golden Lane estates, the Georgian and Victorian houses of Smithfield and the Temple, and a growing stock of converted commercial buildings. Constant construction, traffic and early-morning deliveries make acoustic performance the priority here, and the City's heritage controls make internal secondary glazing the natural solution.
90+
Projects Completed
600+
Listed Buildings Served
27
Conservation Areas
Working in City of London
The City of London Corporation manages twenty-seven conservation areas and hundreds of listed buildings within a single square mile. The Barbican's listed status extends to its original window systems, and we have developed reversible secondary solutions that preserve the estate's Brutalist detailing.
Request a Survey- Barbican Apartment
- Golden Lane Flat
- Georgian Town House
- Warehouse Conversion
- Chambers Residence
What We Solve in City of London
Listed Brutalist Window Systems
The Barbican's original frames are protected by its Grade II listing. Our reversible, internal secondary units are designed around the estate's specific window modules and leave the originals untouched.
Round-the-Clock Construction Noise
The City rarely stops building. Our acoustic laminate glass targets the impact and plant noise from neighbouring sites that thin single glazing transmits directly.
Thermal Loss in Concrete Frames
Large single-glazed openings set in concrete lose heat quickly. Secondary glazing creates the insulating air gap these buildings were never designed with.
Free Survey — No Obligation
Ready to transform your City of London home?
Planning Secondary Glazing in City of London
Services
- Secondary glazing for listed buildings
Reversible, consent-friendly installations for listed and conservation-area homes.
- Acoustic window inserts
Laminated acoustic glass and wide cavities for traffic, rail and flightpath noise.
- Commercial secondary glazing
Schools, hotels, offices and churches, fitted around your operating hours.
From the Journal
- Acoustic ScienceHow Far Apart Should Secondary Glazing Be? The Air Gap Explained
Why a 100–200mm air gap is the key to secondary glazing noise reduction, how cavity depth affects resonance and heat, and which glass to pair it with.
- Thermal Performance5 Energy-Saving Mistakes Period Property Owners Make (And How to Avoid Them)
Five common mistakes cost heritage homeowners comfort, money and character — and how to fix them the right way.
- 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.
Secondary Glazing Across Central London
Secondary Glazing City of London: Listed Building Specialists
90+ installations completed in City of London. The Square Mile is better known for offices than homes, but it contains some of London's most distinctive residential settings — the Grade II listed Barbican and Golden Lane estates, the Georgian and Victorian houses of Smithfield and the Temple, and a growing stock of converted commercial buildings. Constant construction, traffic and early-morning deliveries make acoustic performance the priority here, and the City's heritage controls make internal secondary glazing the natural solution.
City of London Homes, Offices and Noise: What We See on Survey
Most of the people who live in the City live on a few estates. The Barbican is Grade II listed, and its flats have large single-glazed timber windows and balcony doors with strict guidance on what can be changed. Secondary glazing is the accepted way to improve them, but it has to follow the estate's approved designs and colours. The Golden Lane Estate is also listed. Beyond these, the City has converted warehouses and offices with large steel or timber windows, and a small number of older houses and churches.
The City is busy and noisy around the clock. London Wall, Beech Street and the Aldersgate and Farringdon roads carry traffic day and night, and construction is almost constant somewhere in the Square Mile. Homes near Liverpool Street, Moorgate, Barbican and Farringdon hear trains and the Elizabeth line works, and the late-night economy around Smithfield and Shoreditch adds evening noise. For bedrooms we usually fit acoustic laminate with as wide a gap as the reveal will allow.
Much of our City work is commercial: offices, livery halls and churches that want to cut heat loss and noise without changing listed facades. For the Barbican and Golden Lane we follow the City Corporation's listed building management guidelines and prepare the paperwork for consent. For offices we fit around the building's operating hours, often outside working time.
Why Choose Us for City of London Secondary Glazing
Call 020 7060 1572 for a free heritage window survey in City of London.
Helpful Secondary Glazing Guides
Planning a project in City of London? 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 City of London Homes
Whatever your windows or your priority, we have a dedicated City of London solution:
- Sash window secondary glazing — discreet units for City of London's period sashes
- Bay window secondary glazing — bespoke systems for angled and curved bays
- Noise reduction glazing — up to 80% quieter, ideal for busy City of London streets
- Secondary glazing for listed buildings — reversible, consent-friendly installations
- Secondary glazing cost guide — transparent pricing for your City of London project
- Secondary vs double glazing — which is right for a City of London period home
- Commercial secondary glazing — our dedicated service for schools, hotels, offices and churches
- Secondary glazing across London — how we serve heritage homes capital-wide