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Conservation and Heritage Doors

Custom Timber Doors for Period Properties

At Derwen Joinery, we specialise in crafting bespoke timber doors that enhance the character of period homes and listed buildings. In conservation projects, doors are more than just a functional element, they set the tone for the entire property and must align with its architectural heritage. Our doors are designed to blend seamlessly with traditional styles while meeting Conservation, Grade I & Grade II listed requirements alongside planning standards.

Using sustainably sourced timbers and traditional joinery techniques, we ensure every door not only looks authentic but also delivers on performance, security and longevity. From panel layout and glazing options to mouldings and finishes, each door is tailored to reflect the unique style of the property it belongs to.

Have a Project in Mind? Let’s Talk.

 At Derwen Joinery, we believe every exceptional piece begins not with timber, but with a conversation. We are genuinely interested in your ideas, your questions, and the unique details that will make your project a perfect fit for your space. Understanding your vision is the most crucial part of our craft. Get in touch with us today to discuss your plans and let’s begin the journey of bringing them to life.

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Timeless Design for Heritage Properties

Our conservation and heritage timber doors and frames are handcrafted to suit conservation areas, listed buildings and period restorations.

Derwen Joinery can replicate existing heritage door sets to meet exacting specifications, whilst enhancing security, U-values and overall performance.

We can match existing colours and finishes with the application of our in-house high performing three coat spray system. Each door and component would be end grain sealed to be finished in any RAL colour, with dual-colour options available for period accuracy.

Complete your design with traditional ironmongery in an array of finishes and styles ensuring every detail complements your property’s heritage.

    Frequently Asked Questions (FAQ)

    What are conservation windows and doors?

    Conservation windows and doors are specifically designed to replicate the appearance and function of original features found in period properties, listed buildings and homes within conservation areas.
    At Derwen Joinery, we craft bespoke timber windows and doors that respect the architectural heritage of your property, combining traditional design with modern performance. Every detail, from mouldings to glazing bars are carefully recreated to ensure authenticity and compliance with conservation standards.

    Can I replace windows and doors in a listed building?

    Yes, but you’ll need Listed Building Consent from your local authority before starting any work. Even like-for-like replacements usually require approval, as any alteration that affects the property’s character or appearance is regulated under heritage laws.

    Do I need permission for new timber windows or doors in a conservation area?

    In most cases, yes. If your property is in a conservation area or is listed, you’ll need permission for any change that alters the external appearance of your home. Our team can assist by providing technical drawings and detailed specifications to support your application.

    How can I make sure my new windows and doors meet conservation requirements?

    Your replacement products must match the originals in style, proportions, materials and detailing. This includes replicating features such as:

    • Glazing bar patterns and moulding profiles

    • Opening styles (e.g. sash, casement, or panelled doors)

    • Traditional ironmongery and finishes

    Derwen Joinery ensures every timber window and door is made bespoke to your building’s exact requirements.

    Are your windows and doors approved by conservation officers?

    All our timber windows and doors are crafted to comply with  local conservation guidelines. We supply full CAD drawings, detailed specifications and heritage glazing options to support your Listed Building Consent application.

    Why is timber the preferred material for listed and heritage properties?

    Timber remains the preferred material for heritage buildings, as it faithfully replicates traditional craftsmanship and detailing.
    Our timber products deliver:

    • Authenticity – Accurate period profiles and traditional joinery

    • Longevity – Superior strength and stability

    • Sustainability – Responsibly sourced materials

    • Planning approval confidence – Trusted by heritage officers and more likely to meet conservation requirements

    How does the listed building consent process work for windows and doors?

    1. Consult early with your local planning authority or conservation officer.

    2. Document existing features with photos and measurements.

    3. Submit your application including detailed designs, materials and justification for replacement.

    Our team can provide all necessary technical documents and heritage detailing to support a smooth approval process.

    What are common mistakes to avoid with heritage window and door replacements?

    • Starting work without Listed Building Consent

    • Using uPVC, composite or aluminium instead of timber

    • Failing to match historic details like mouldings or proportions

    • Ignoring heritage glazing rules

    Working with Derwen Joinery ensures your project meets every conservation and performance standard.

    Can my new conservation or heritage windows and doors have double glazed units?

    Depends, each project will have varying requirements dependent on status and location. But yes, vacuum glass (VIG), 12mm heritage and 24mm DGU have been approved for manufacture. Rising energy prices have increased demand for higher-performing, energy-efficient windows especially in older properties and this is considered by conservation officers.

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