Sash Windows for Conservation Areas and Heritage Homes

Compliant, high-performance timber sash windows designed for sensitive planning areas across the UK.

We specialise in double glazed wooden sash windows for all types of properties throughout London. We can replicate existing designs and are experts in creating traditional wooden sash windows for homes in conservation areas.

Conservation-Grade Timber Sash Windows, Without the Stress

You need sash windows that look the part and pass planning. At Sash Window Shop Online, we help you get both.

We offer heritage-style timber sash windows made to order – perfect for homes in conservation areas or under Article 4 direction.
 
  • Traditional joinery details with modern energy efficiency

  • Slim-profile vacuum or double glazing options

  • Conservation officer–friendly glazing bar layouts

  • Accoya®, hardwood or softwood timber options

  • Full planning assistance if needed

  • Delivered across Central and Southern England.

order accoya timber sash windows online

Planning Permission Guidance, Included

Don’t know where to start? If you’re in a conservation area or have an Article 4 direction, we offer guidance every step of the way:

  • Free advice on what’s likely to be approved

  • CAD drawings with every order

  • Planning-friendly specifications

  • Optional help preparing your planning application

 We’ve secured approvals in London, Berkhamsted, Cambridge, and beyond.

Energy Saving Double Glazed Victorian Timber Sash Windows

Designed to Meet Conservation Requirements

Our sash windows are hand-built with authentic heritage features, such as:

  • Slim meeting rails

  • Putty-line glazing

  • Lamb’s tongue or ovolo beading

  • True or applied glazing bars

Whether you’re working with a conservation officer, planning consultant, or architect, our windows have the look and specs to get approved.

Venetian Sash Window

Supply-Only Sash Windows for Heritage Projects

We specialise in made-to-order sash windows, delivered nationwide for supply-only projects. Perfect if you’re:

  • Managing your own renovation

  • Working with a trusted builder

  • Replacing windows one at a time

Get them delivered straight to site or home, ready for installation.

Georgian Style Wooden Sash Window with Timber Putty Effect Glazing Bars for Conservation Areas

View our vacuum glazed wooden sliding sash window up close

Timber and Glazing Options That Satisfy Conservation Rules

You can customise your order to meet both planning and performance needs:

  • Timber: Accoya®, hardwood, softwood

  • Glazing: Vacuum glazing, heritage double glazing

  • Bars: True / applied glazing bars with authentic putty line look

  • Finish: Any RAL colour or stain, primed or fully finished

Heritage Style timber glazing bars perfect for conservation areas

What is a Conservation Area?

In the UK, conservation areas are protected zones where buildings must preserve their architectural character. Many areas also have an Article 4 Direction, which removes permitted development rights -meaning you must apply for planning permission even for like-for-like window replacements.

Our team understands the nuances and helps you navigate them.

Accoya sash windows

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