Home Improvements in Winchester: Windows, Doors & Extensions
KJM Group has been the trusted name for home improvements in Hampshire since 1983. As an independent, family-run business, we have spent over 40 years helping Winchester homeowners upgrade their properties. We are not a national chain with aggressive sales tactics; we are local experts committed to quality engineering and honest advice.
Winchester is a city of contrasts, blending the medieval history of the Cathedral and High Street with the modern family homes of Badger Farm and Weeke. Improving a home here requires a tailored approach. Whether you need high-performance triple glazing for a townhouse near the station or a secure composite door for a cottage in St Cross, we have the specific expertise to make it happen.
Why Winchester Chooses KJM Group
KJM Group has been serving Winchester and the surrounding SO22/SO23 postcodes since 1983. We understand that Winchester is unique. The mix of strict Conservation Areas in the city centre and the 20th-century architecture of suburbs like Badger Farm means "one size" definitely does not fit all.
We specialise in Timber Alternative systems that respect heritage, providing the authentic look of traditional joinery—essential for maintaining property values in places like St Cross—while providing the modern security and thermal efficiency of 21st-century engineering.
Rated 4.9/5 by over 700 local customers
Which? Trusted Trader | Checkatrade Approved
Key Takeaways for Winchester Homes
- Conservation Ready: Approved flush sash designs for St Cross & Hyde.
- Modern Living: Aluminium bi-folds for extensions in Weeke & Badger Farm.
- Planning Handled: We manage all "material change" permissions for you.
- Local Integrity: Honest advice and a No Pressure Promise.
Heritage Windows for Winchester's Conservation Areas
A significant portion of Winchester falls within designated Conservation Areas. In these zones, standard "white plastic" windows are often forbidden by planning officers to preserve the visual history of the city.
KJM Group specialises in navigating these restrictions. We offer the Residence Collection and Roseview Sash windows. These are designed specifically to replicate the exact dimensions, mechanical joints, and sightlines of 19th-century timber joinery. They preserve the historic character of your street while providing modern A-rated thermal efficiency and security.
Explore Heritage Options:
Front & Rear Doors: Security Meets Style
Your front door sets the tone for your entire property. For many Winchester homes, a generic uPVC door simply doesn't do justice to the architecture. We offer a stunning range of Composite Doors that combine the traditional look of painted timber with modern, low-maintenance materials.
As seen in the image, styles like the 'Flint Beeston' stable door in Painswick colour are incredibly popular for cottages and period terraces in the city. Unlike timber, they will never warp, twist, or need painting.
Crucially, security is built-in, not bolted on. Every door we install features a Solid Timber Core or high-density foam core, making them significantly stronger than standard panel doors. We fit them with premium multi-point locking systems and anti-snap cylinders as standard, ensuring your home in Winchester remains a sanctuary, safe from intruders and draughts alike. Whether you need a secure back door or a grand entrance, we have the solution.
Find Your New Door:
Tiled Extensions & Garden Rooms
Many family homes in areas like Badger Farm and Kings Worthy have older conservatories that are too hot in summer and too cold in winter. We specialise in transforming these underused spaces into year-round living areas with Solid Tiled Roofs.
By replacing a glass or polycarbonate roof with a fully insulated tiled structure, you create a true extension. We use advanced lightweight systems that can often be retrofitted to existing frames (subject to survey). As shown in the images, we take care to match the external tiles to your house for a seamless look, ensuring the extension looks like it has always been there.
Internally, the transformation is dramatic. We install a plastered, vaulted ceiling complete with insulation that achieves U-values as low as 0.15 W/m²K. You can add Velux roof windows to flood the adjoining room with light, or integrated LED downlights for a cosy evening atmosphere. This turns a "summer-only" conservatory into a permanent dining room, home office, or lounge.
Transform Your Space:
Modern Performance Upgrades
Ultra-slim sightlines for modern extensions. Includes Bi-Folds and Sliders.
View Aluminium RangeThe ultimate in thermal efficiency and noise reduction for city living.
View Triple GlazingHigh-quality, secure, and energy-efficient replacement windows.
View Double GlazingHow We Work in Winchester
We know that home improvements can be stressful. Our process is designed to be transparent, honest, and pressure-free, backed by our 40 years of experience.
Free Design Consultation
We visit your home to measure up and discuss your needs. No hard sell, just expert advice.
Transparent Quotation
You receive a detailed, written quote. We leave you to decide in your own time.
Expert Installation
Our employed fitters install your new windows or doors with minimal disruption and zero mess.
Local Project Spotlight: The Weeke Transformation
We recently helped a family in Weeke transform their cold, 1990s polycarbonate conservatory into a stunning, warm garden room. By installing a lightweight tiled roof system complete with two Velux windows and a set of aluminium bi-fold doors, they gained a bright, modern living space they now use every single day.
"We couldn't be happier with the result. The team were polite, tidy, and the finish is exceptional."
Ready to Upgrade Your Home?
Get a free, no-obligation quote from Winchester's trusted experts.
Request Your Free QuoteOr call us on 01264 359355
Winchester Home Improvement FAQs
Yes, absolutely. We cover the entire Winchester district. We frequently work in Kings Worthy, Headbourne Worthy, Littleton, Sparsholt, Hursley, Twyford, and Colden Common.
Yes. For conservatories, orangeries, and tiled roof extensions, we take great care to source bricks that match your existing property as closely as possible. This ensures the new structure looks like a natural part of your home, not a bolt-on.
Yes. Changing a glass roof to a solid tiled roof requires Building Regulations approval to ensure thermal performance and structural integrity. KJM Group manages this entire process for you with the local authority.
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