Heritage Sash Windows
All sash windows are manufactured in-house at our London workshop using traditional joinery methods and high-quality hardwood or Accoya wood.
With over 35 years’ experience, we produce handcrafted sliding sash windows & casement sash windows for period homes, listed buildings, and properties in conservation areas. Always made to match the original detailing while meeting modern performance standards.
Front Doors
Our front doors are made to reflect the original architectural character of your property, whether Georgian, Victorian or Edwardian in style. All doors are fully bespoke, with custom panel layouts, mouldings, fanlights and traditional ironmongery to suit.
We use Accoya or selected hardwoods for durability, and offer modern thermal and acoustic performance without compromising appearance.
Multi-point locking systems are fitted discreetly, offering enhanced security in a period-correct design.
Rear Doors
Timber rear doors are designed with simplicity and function in mind, often installed in kitchens, side returns or mews entrances. We match existing detailing or create new doors to suit the building’s age and style, incorporating traditional boards, panels, or glazing where required.
Rear doors can be supplied with heritage glazing, security locks, and draught-proofing, and are finished to the same high standard as our front doors.
French Doors
Ideal for garden access and rear elevations, our French doors are designed to replicate original period joinery while delivering improved insulation and security. Options include full-height glazing, timber mullions, astragal bars, or solid lower panels — all made to match your property’s existing features.
French doors are available with a range of double-glazing options, traditional butt hinges, and concealed multi-point locking systems.
Garage Doors & Gates
We manufacture solid timber garage doors and entrance gates to complement period properties and traditional boundary treatments. Each set is made to order, with traditional jointing, boarded or panelled construction, and durable finishes.
Ideal for mews garages, garden walls, or side entrances, our doors and gates are both functional and appropriate for listed or conservation-area settings.
Bi-Fold Doors
Where a wider opening is needed, we offer bespoke timber bi-fold doors made in keeping with traditional design. While contemporary in use, our bi-folds maintain a heritage look with slender profiles, classic ironmongery, and the option of heritage double glazing.
Each set is custom-made to suit the size and style of the opening, offering improved access to gardens, terraces, or extensions, without disrupting the original character of the building.
Reliable Trade Supply for Over 20 Years
Landmark is a trusted name in the supply of timber sash windows and doors to the trade.
Working with sash window specialists, builders, and architects across London and the South East.
Over 80% of our production is dedicated to trade clients, delivering consistent, high-quality joinery built to meet the demands of period homes, listed buildings, and conservation projects.
Traditional Joinery Methods in Doors
All of our doors are made using traditional joinery techniques in our London workshop. Each door is built from solid Accoya or hardwood, using traditional joints, hand-fitted panels, and mouldings that reflect the architectural period of the property.
We produce front doors, rear doors, French doors, bi-folds, and garage doors, all custom made with a wide range of glazing options, solid panels, and bespoke ironmongery.
Whether matching original features or designing for a conservation-led project, our approach ensures strength, stability, and lasting performance in every door we make.