Timber window restoration and replacement in Greenwich
Specialist timber window restoration in Greenwich and south east London. Sash and casement repair, replacement and slimline double glazing for period homes.
Barnsbury Joinery provides specialist timber window restoration and replacement across Greenwich and the surrounding south east London area. Our joiners combine traditional, conservation‑grade craftsmanship with discreet energy‑efficiency upgrades, helping homeowners and property managers preserve the heritage character of period buildings while improving comfort, warmth and day‑to‑day performance.
From a Georgian townhouse near Greenwich Park to a Victorian terrace in Westcombe Park or a more contemporary property in North Greenwich, every set of windows we work on is treated on its own terms. We assess the existing joinery, understand the building's period detail and recommend the approach that keeps as much original timber as possible, so your windows read correctly and last for decades to come.
Local timber window specialists for Greenwich
Greenwich is one of London's most architecturally significant areas, with protected views, conservation areas and a high concentration of listed and period buildings. Timber windows in these homes are rarely standard: original box sashes, deep reveals, run‑through horns and hand‑made glazing bars all carry detail that mass‑produced replacements simply cannot match. Our work is built around respecting that detail rather than stripping it away.
Wherever possible we restore rather than replace. Sound frames, sashes and casements can usually be repaired, re‑balanced and draught‑proofed to perform like new, retaining the original glass and joinery that give a period property its character. Where timber is beyond saving, we replicate the historic profile precisely, so a repaired or replaced window sits comfortably alongside the originals and satisfies conservation and planning requirements around Greenwich.
Our timber window services in Greenwich
We offer a complete range of timber window services for period and listed homes across Greenwich and south east London, covering everything from careful repair to full bespoke replacement.
Timber window restoration: repairing and preserving original frames, sashes and casements, splicing in new timber where needed and retaining as much period detail as possible.
Timber window replacement: handcrafted, made‑to‑measure timber windows that replicate historic profiles faithfully, or introduce new styles for later additions and extensions.
Sash window repairs: replacing broken sash cords, easing and re‑balancing sashes, freeing painted‑shut windows and adding discreet draught‑proofing for smooth, quiet operation.
Casement window repairs and installation: repairs and replacements for both traditional and contemporary timber casement windows, including ironmongery and weatherproofing.
Draught‑proofing and slimline double glazing: modern, energy‑efficient upgrades that reduce heat loss, rattle and noise while retaining the property's heritage appearance.
Why choose Barnsbury Joinery in Greenwich
We are a specialist heritage joinery firm, and timber windows are at the core of what we do. That focus matters in an area like Greenwich, where planning oversight is strict and the wrong intervention can damage both the fabric and the value of a home.
Greenwich heritage expertise: we have experience working on listed buildings and properties within conservation areas around Greenwich town centre, Blackheath and Deptford, and we understand what conservation officers expect to see.
Craftsmanship and sustainability: all timber is responsibly sourced, and our restoration‑first approach keeps original material in place and out of landfill wherever it can be saved.
Energy efficiency without compromise: through draught‑proofing, slimline double glazing and careful re‑fitting, we improve thermal comfort while protecting the period features that make your home distinctive.
Trusted across London: our reputation is built on precise, reliable workmanship and clear communication, from the first survey through to the final finishing coat.
Restoring period windows the right way
Every project begins with a proper assessment. We look at the condition of the timber, the state of the sash mechanism, the glazing, the paint history and any signs of rot or previous poor repairs. From there we set out a clear, honest recommendation: what can be restored, what needs replacing and why.
Restoration work typically includes cutting out and splicing in new timber to match, repairing or renewing sash cords and weights, overhauling pulleys and staff beads, and reinstating a smooth, balanced action. We then draught‑proof the window with a discreet brush‑seal system that dramatically reduces heat loss and rattle without being visible from the street. Finished with a durable paint system, a restored window can outlast a modern replacement while keeping the property's original character fully intact.
Where slimline double glazing is appropriate, we can upgrade historic sashes and casements with narrow units designed to suit period sightlines, giving you the insulation and acoustic benefits of double glazing while preserving the delicate proportions of the original joinery.
Areas we cover near Greenwich
Alongside Greenwich itself, we regularly carry out timber window restoration, repair and replacement across the wider south east London area, including Blackheath, Deptford, Lewisham, Charlton, Woolwich and Canary Wharf.
Because so many homes in these neighbourhoods share the same Georgian and Victorian window types, we are well placed to advise on what will satisfy local conservation guidance and what will suit your particular property. If you are anywhere in south east London and need experienced timber window specialists, we would be glad to help. Get in touch to discuss your project or request a survey.
What our clients value
Homeowners and property managers across Greenwich and south east London come to us because we treat their windows as the historic joinery they are, not as items to be ripped out and replaced. Clients regularly tell us that the difference in warmth and quiet after draught‑proofing is immediate, and that a well‑executed restoration is all but invisible except for how smoothly the windows now open and close.
We work with private homeowners, landlords and commercial property managers alike, and much of our work comes through repeat clients and personal recommendation, which we take as the clearest sign that the finished result and the experience of working with us both stand up.
Common questions
Do you work on listed buildings in Greenwich?
Yes. We are experienced in restoring and replacing timber windows in Greenwich conservation areas and listed properties, working to match historic profiles and helping you meet planning and heritage requirements.
Can you install slimline double glazing in original windows?
Yes. We specialise in upgrading historic timber sashes and casements with discreet slimline double glazing that improves insulation and reduces noise while preserving period sightlines.
How long does a window restoration project take?
Most projects are completed within one to five days depending on scope and the number of windows involved. We set out a clear timeline during the initial survey so you know what to expect.
Do you cover both residential and commercial properties?
Yes. We work with homeowners, landlords and commercial property managers across Greenwich and south east London, on everything from a single sash repair to full replacement programmes.
How do I get started?
Contact us to discuss your windows and request a survey. We will assess the condition of the joinery, recommend the best approach and provide a clear written quote before any work begins.
Request a survey
Request a survey for your project, from a single commission to a whole scheme.
Request a surveyA studio of The Barnsbury Group
Barnsbury Joinery is the flagship studio of The Barnsbury Group, a second‑generation heritage joinery house. Established in London in 1987, it makes bespoke joinery by hand and carries the parent voice for the family of studios.
