TRADING SINCE 1849

Crafting beautiful steel windows and doors since the reign of Queen Victoria.

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High-quality, hand-crafted products that are designed to last a lifetime.

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Steel french doors and windows

Why Steel is the Right Choice for Heritage Projects

When a building is listed for its architectural or historic interest, the replacement window or door must respect the original design intent. Steel is the only material that replicates the slim sightlines, sharp geometry and structural character of period fenestration with complete authenticity.

Timber and aluminium alternatives cannot achieve the same narrow profiles without compromising structural integrity. uPVC is rarely accepted by conservation officers for listed building consent. Steel — and specifically Crittall steel — remains the specification that planning authorities trust and approve.

Beyond aesthetics, our steel windows and doors are hot-dip galvanised and finished in Duralife® polyester powder coat, providing decades of corrosion resistance with minimal maintenance. For heritage projects where longevity and low disruption are essential, this matters.

Compare Crittall® Window Ranges

Find the right window for your project.

  • Case Studies

Our Recent Work

Black Crittall steel-framed glazed doors opening from a contemporary living and dining area onto a garden terrace.

New-build family homes in Reigate by Lightfoot Windows

A shared plot and a shared vision Nic and Sam Burchett previously lived in the...

2026 Crittall House of the Year finalist in St Albans featuring a gabled family home, steel-framed glazing and landscaped garden.

Heritage-inspired self-build in St Albans by Metwin

Designing a home from scratch Homeowners Andy & Dixie had lived in St Albans for...

Red brick country house with a gabled glass extension and Crittall windows, set behind clipped hedges.

Established family home renovation in Shropshire by Three Spires Glass

From boot room to whole house renovation For this renovation, Alison and her husband Stu...

Modern kitchen in a 2025 Crittall House of the Year finalist property, featuring black steel-framed glazed doors, dark cabinets and a marble-effect island.

Ambitious project in South West London by Bespoke Glazing Design

This case study shines the spotlight on a compelling project that secured a runner-up position...

Crittall House of the Year Awards 2025 finalist with black steel windows, glazed doors and a glass balcony on a renovated Sussex home.

Restoration in rural Sussex by Lightfoot Windows

This project, executed by our specialist reseller Lightfoot Windows, focused on a listed property in...

2025 Crittall House of the Year finalist featuring a modern white-rendered home with black steel windows, glazed doors and glass balcony.

Modern renovation in South Yorkshire by KJA Services

The Crittall House of the Year (CHOTY) awards celebrate our commitment to excellence by recognising...

Design Flexibility

Tailor your vision with a range of colours, hardware finishes, and window configurations. Explore our downloadable resources to find inspiration and technical specifications to bring your design to life.

  • Hardware
  • Downloads

Popular Colours

Black
Traffic Grey
Agate Grey
Light Grey
White
Pastel Green

A colour to suit your home

Our steel windows are available in a wide range of bespoke colours, including our signature black steel. We take pride in providing high quality windows that are coated with Duralife Polyester powder, guaranteeing a consistent and durable finish. With so many options available, you're sure to find the perfect match for your property or project.

Selected: Black

Black

Selected: Traffic Grey

Traffic Grey

Selected: Agate Grey

Agate Grey

Selected: Light Grey

Light Grey

Selected: White

White

Selected: Pastel Green

Pastel Green

Hardware

Hardware

We offer a wide range of high-quality window and door hardware options. Our partnership with Frank Allart, makers of fine English hardware since 1914, ensures that you have access to the best in craftsmanship and design.

Soho Casement Handle

Soho Casement Handle

Phoenix Casement Handle

Phoenix Casement Handle

Deco Casement Handle

Deco Casement Handle

Berkeley Casement Handle

Berkeley Casement Handle

Arched Casement Handle

Arched Casement Handle

Straight Casement Handle

Straight Casement Handle

Scroll Casement Handle

Scroll Casement Handle

Curved Casement Handle

Curved Casement Handle

Sliding Stay With Round Knob

Sliding Stay With Round Knob

Sliding Stay With Butterfly

Sliding Stay With Butterfly

Straight Peg Stay

Straight Peg Stay

Curved Peg Stay

Curved Peg Stay

Single Folding Opener

Single Folding Opener

Downloads

Frequently Asked Questions

We understand you may have queries about our products and services. We’ve answered some of the most common questions below.

Will Crittall steel windows be accepted by conservation officers for listed building consent?

Yes. Crittall steel windows are widely accepted by conservation officers across the UK because they authentically replicate the original profiles and sightlines of period fenestration. Our T60 range is specifically designed for like-for-like replacement on listed buildings, matching the dimensions and visual character of original steel window installations. We recommend contacting your local planning authority early in the project and can provide technical documentation to support your application.

Which Crittall product is most suitable for a Grade II listed building?

The T60 range is the primary recommendation for Grade II and Grade I listed buildings. It directly replicates the original Crittall steel window profile in both proportion and appearance. For period residential properties where the original modular metal window was specified, the Homelight® range is the appropriate choice. Our specification team can advise on the correct product for your specific planning brief.

Do Crittall steel windows meet current UK Building Regulations for listed buildings?

Yes. All Crittall products are manufactured to comply with current UK Building Regulations, including Part L thermal performance requirements. Our thermally enhanced W20 TE® system delivers low U-values without increasing profile width, meaning energy performance improvements can be achieved while maintaining the slim sightlines required for listed building consent.

Can steel windows be specified for conservation area properties that are not formally listed?

Yes. Conservation area properties that are not formally listed still benefit significantly from steel window specification. Planning authorities in conservation areas typically require replacement windows to respect the character and appearance of the original building. Crittall steel windows are consistently approved in these contexts due to their authentic profiles and period-appropriate aesthetics.

What technical documentation is available to support a heritage specification?

Crittall provides a comprehensive range of specification resources including NBS clauses, CAD drawings, data sheets, 3D ISO renders and product brochures. All documentation is available to download from our resources section or can be requested directly from our specification team. We also work alongside architects and conservation officers throughout the project process.

Are Crittall steel windows suitable for arched or non-standard openings in historic buildings?

Yes. Crittall windows and doors are manufactured to bespoke dimensions and can be produced to suit arched, curved and non-standard openings commonly found in historic buildings. The Corporate W20 system in particular offers the widest range of profile configurations for complex or unusual heritage briefs.

Can’t find the answer you’re looking for?

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Products Recommended for Heritage Specification

T60 Windows & Doors

The T60 range directly replicates the original Crittall steel window profile. Designed specifically for replacement and refurbishment projects, T60 matches the sightlines, dimensions and visual character of period installations while incorporating modern glazing and thermal performance. It is the first choice for like-for-like replacement on listed buildings.

Homelight® Windows

The Homelight range replicates the original modular metal window system that was specified across residential new builds throughout the twentieth century. Available in 45 standard configurations, Homelight is ideal for conservation area properties and period homes requiring sympathetic replacement.

Corporate W20® Doors & Windows

For heritage projects requiring a wider range of configurations — including larger commercial openings, arched frames or composite assemblies — the Corporate W20 system provides the flexibility to meet complex planning briefs without sacrificing the authentic steel aesthetic.

For a full overview of period property window options, profiles, glazing choices and finish samples available to support conservation officer review, visit our dedicated Steel Windows for Period Properties page.

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Steel MW40 windows interior

Specification Support for Architects & Conservation Officers

Crittall provides a full range of technical resources to support heritage specification, including NBS clauses, CAD drawings, data sheets and 3D ISO renders. Our specification team works directly with architects, project managers and conservation officers throughout the project process. Approved installers handle submissions and site method statements, and all designs align with Historic England guidance and current Building Regulations.

All products are manufactured in Britain and carry Made in Britain, FENSA and CHAS accreditations — documentation that supports listed building consent applications and procurement requirements.

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Why Steel is the Right Choice for Heritage Projects

Low-E glass can be specified to meet Part L targets and acoustic requirements while keeping sightlines lean. Trickle ventilation and modern seals improve comfort without changing the period look. Each elevation is surveyed and glass and frame pairings are proposed to balance performance with heritage constraints.

Steel w20 windows
Black internal steel doors

Start Your Heritage Project Specification

Contact the Crittall team to discuss your listed building project, request a specification pack or locate your nearest approved Crittall Specialist Partner.

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Trio of french doors for London home

Start your Crittall journey

Transform your home by finding your local Crittall approved installer. Our specialist partners offer a stress-free service from enquiry to after-sales support.






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    Customer Reviews

    Take a look at some of our customer reviews to see how Crittall windows and doors have transformed real-world spaces. Customer reviews offer valuable insights beyond aesthetics, providing details on installation experiences, long-term performance, and the overall impact Crittall's windows and doors had on their projects.

    Very professional and made it easy to work with the marketing team. I hope to continue our professional relationship in future.

    Liam Garwood

    Great Britain

    I just worked with Crittall Windows on a project and they were brilliant to work with! Great attention to detail and very passionate about their products! First class, many thanks

    Steven

    Great Britain

    I was replacing a very old circular Crittall window and an existing wooden internal screening door/panels. The fit and finish and attention to detail were perfect on these. Very happy with the result.

    Michael Mullany

    Ireland

    The Crittall design meant we could retain a traditional feel which would fit with the overall look of the house.

    KAREN WELSTEAD

    Scotland, UK

    All of our visitors comment on our stunning doors and we all love the beautiful shadows in the kitchen created by the frames – its like a cobweb of shadows!

    HANNAH

    SW London, UK

    Nothing shouts 1930’s elegance like original Crittall windows … We feel as though we are on the set of a Poirot shoot when we walk inside

    HARRY & VIC

    Lake District, UK

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