Add an extra room to your home with a custombuilt Garden Room from
Gardenroom-Mart.

The perfect option for a Home Office, Garden Room, Studio, Home Cinema or Summerhouse and planning permission is rarely required. Multi-purpose use and as insulated as your home, our garden rooms are built to meet our customers needs.

Would you like to see our range of brochures?

The Garden Room

Built from Pod foundations with bespoke suspended steel insulation floors, tanalised pressure treated tumber, 80mm celotex insulation, breathable membrane, external cladding built with treated cedar and epdm one-piece roofs.

All windows and doors are pvc or aluminium energy A rated and high-security and all internals are plastered. LED lighting, sockets, armoured cable from your house and Part P certificate.

Also available is underfloor heating, laminate wood, floor tiles, decking, integral blinds etc.

A modern home office with a white desk, white chair, orange lamp, laptop, and glass of water. Large uPVC glass doors and windows reveal a green garden outside in Billingshurst. A wall-mounted TV is above the desk.
A small wooden garden office or shed with a deck, featuring uPVC-framed glass double doors illuminated by purple LED lights at dusk - perfect for stylish workspaces in Crawley.

Experienced Team

Our experienced building team will ensure that your garden room is designed, supplied and installed to your requirements.

We listen to our customers and pride ourselves on our commitment to excellence in service and quality.

We also offer end-to-end service including final décor and external landscaping if required.

Frequently Asked Questions

What can a garden room be used for?

Garden rooms are a versatile option for a home office, studio, home cinema, summerhouse, games room or almost any other use you have in mind. They are designed to meet your specific requirements rather than a one size fits all layout.

Do I need planning permission for a garden room?

Planning permission is rarely required for a garden room, since most fall under permitted development rules, provided they stay within standard height, position and coverage limits. This changes if your garden room includes sleeping accommodation, sits close to a boundary, or your property has restricted permitted development rights, so it is always worth checking your specific situation with us or your local council before you start.

Are garden rooms insulated enough to use all year round?

Yes. Our garden rooms are built with 80mm Celotex insulation and a breathable membrane, combined with A rated PVC or aluminium windows and doors, so they are as insulated as your home and suitable for year round use, whatever you are using the space for.

What are your garden rooms built from?

Each garden room is built on pod foundations with a bespoke suspended steel insulated floor, using tanalised pressure treated timber for the frame. External cladding is treated cedar, and the roof is a one piece EPDM membrane. Internally, everything is plastered for a proper finished room rather than a basic outbuilding.

Do garden rooms need electrics and building regulations sign off?

Our garden rooms include LED lighting, sockets and an armoured cable supply run from your house, along with a Part P certificate for the electrical installation, so the work is properly certified. Depending on the size, use and position of your garden room, wider building regulations may also apply, which we can advise you on as part of your quotation.

Can I add extras like underfloor heating or blinds?

Yes. Alongside the standard specification, we can also include underfloor heating, laminate wood or floor tiles, decking, and integral blinds, so you can finish the space to suit how you plan to use it.

Do you handle the whole project, including decor and landscaping?

Yes. Our experienced building team designs, supplies and installs your garden room from start to finish, including final décor and external landscaping if required, so you are not left coordinating separate tradespeople.

How long does it take to get a quotation?

We visit your property to listen to your requirements, take measurements and explain the product, then send a detailed quotation within 5 days, including specifications and drawings.

Will I be dealing with a salesperson?

No. Our policy is not to employ salesmen. You will only deal with tradesmen, who give free and accurate advice based on what your garden room actually needs.

Do you offer a price match guarantee on garden rooms?

Yes. Ask us about our Price Match Guarantee and we will match any like for like quotation with the same features, specifications and warranties from a comparable company.

Why Choose Us?

Price Match Guarantee

Ask us about our Price Match Guarantee, we will match any like for like quotation.

Purpose Built

For use as Studios, Offices, Summerhouses, Games Rooms or anything else you can think of.

Customer Requirements

Our Garden Room's are designed, supplied and installed to our customer’s requirements.

Experienced Team

We have a highly experienced building team for groundwork and brickwork.

Service and Quality

We stand by our commitment to excellence in service and quality.

End to end service

We take care of everything from start to finish, even final décor and external landscaping if required.

The Gardenroom policy

Our policy is not to employ salesmen, only tradesmen who will give free and accurate advice.

Site visits

We listen to your requirements, take measurements and explain our product.

Quotations

Our detailed quotations are sent within 5 days, and include specifications and drawings.

See our soundproof room in action

Best Price Promise GUARANTEE*

*Provide us with a Like for Like quotation with the same features, specifications and warranties from a comparable company,and we will match the PRICE.
Call us on Now 01403 711 936
Email: [email protected]

A gold, starburst-shaped seal labelled GUARANTEE and WINDOW-MART SUPER PRICE PROMISE highlights our uPVC service second to none in Horsham... with a smaller circle reading CALL Today GUARANTEE in the upper right corner.

What our customers say

Top rated
Based on 52 reviews

Do you need a quote?

Contact us now for a comprehensive FREE no obligation quotation.

About

Established in 1998, Window Mart have gone from strength to strength culminating in the opening of our new show complex at Old Barn Garden Centre near Horsham. All Window Mart staff are employed by the company and drive fully equipped company vehicles. We have our own building team for groundwork and brickwork. In our showroom an extensive range of conservatories, doors and windows can be viewed. Excellence is our commitment and we are here to make sure you get the very best in service and quality.

Contact Us

01403 711 936

Show Complex

Old Barn Garden Centre,
Worthing Road, Dial Post,
Horsham, West Sussex,
RH13 8NR

Opening times:
Mon -Sat: 10am – 4pm
Sunday: 11.30am – 3.30pm

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