The Malvern One Bedroom Annexe

A Spacious, Open-Plan One Bedroom Detached Annexe

Specification Detail
Foundations Concrete Pads or Ground Screws
Services Installed up to 10m from Edge of Room
(additional distance priced separately)
Main Construction – 150mm Insulated SIP Panel Walls
– 175mm Insulated SIP Panel Roof
– Insulated Timber Framed Floor
– Caberdeck Flooring Sheets
– EPDM Rubber Roof Membrane
Windows & Doors UPVC Double Glazed
Cladding – 2 Sides Cedar Cladding / Render
– 2 Sides Box Profile Metal Sheeting in Anthracite
Flooring Vinyl Plank Flooring
Interior Finish Plastered & Painted White
Internal Electrical Fittings Standard White
Kitchen – Howdens Greenwich Base & Wall Units
with Handles
– Laminate Worktop
– Single Sink & Drainer
Kitchen Appliances – Single Electric Fan Oven
– Electric Four Ring Hob
– Integrated Fridge
– Extractor Hood
Bath / Shower Room – Vanity Unit with Wash Basin & Toilet
– Chrome Flush Handles
– Stone Resin Shower Tray with
Sliding Glass Shower Screen or Bath
– Heated Towel Rail
– Extractor Fan
Internal & External Lighting Internal & External Downlights / Rooflight
Heating & Water Electric Underfloor Heating & 120 Litre Immersion Tank
Storage Storage Cupboard
Safety Smoke Detectors
Exterior Decked Step to Entrance Door
Planning Application for Certificate of Lawfulness
All Certification - Building Regulations
- Structural Calculations
- U Values Calculation

Optional Extras

  • Wheelchair Access
  • Premium Glazing
  • Alternative Cladding or Render
  • Upgrades to Standard Specifications
  • Bifold Doors


Additional Site Related Costs

  • Planning Surveys
  • Additional Planning Reports
  • Groundworks beyond 10m from Building Edge
  • Preliminary Costs*
  • Optional Extras

*Expenses related to overnight stays for installation team

Download Price List
1-Bed Annexes

Our Service

We offer a complete service, which includes groundworks^, full structural calculations, standard planning application^^, installation and finishing, based on one of our four annexe models.

Throughout your project, every stage will be managed by our experienced team, from discussing your requirements and suitable annexe models through to manufacturing at our purpose-built facility and installation and finishing on site.

Attention to detail, professionalism and customer service are at the heart of every project we deliver and we’re proud of our reputation for designing, manufacturing and installing stunning annexes built with SIPs.

On every one of our projects our work is carried out in accordance with Health and Safety Executive guidance and regulations for construction. All four of our annexe models can be adapted for different needs and optional extras can be specified.

^Groundworks up to 10m from the edge of the building. Additional distance priced separately.
^^If surveys and/or additional reports are required, these will be charged for in addition to our standard service.

Granny Annexes UK

What’s Included in Our Annexes

Our dedicated in-house team offers a turnkey service, from planning to completion, and will take care of every stage of your project, ensuring that it’s delivered on time and on budget, to the highest of standards.

All of our annexes include the following specification, as standard:

  • Standard Planning Application^^
  • Pad Foundation
  • Services Installed up to 10m from edge of Annexe^
  • Main Construction in SIPs
  • Cladding in Cedar and Concrete Boarding
  • UPVC Windows and Doors
  • SPC Flooring
  • Full Interior Decoration
  • One or Two Bedrooms
  • Bath/Shower Room
  • Kitchenette
  • Metal Sockets and Switches
  • Gas Combi Boiler
  • Radiators
  • Smoke Detectors
  • Rooflight
  • External Decking
  • Internal and External Downlights
  • All Certifications (Building Regulations, Structural Calculations and U Values Calculation)

^Groundworks up to 10m from the edge of the building. Additional distance priced separately.
^^If surveys and/or additional reports are required, these will be charged for in addition to our standard service.

Other Annexe Models

Permitted Development, Planning Permission and Building Regulations Information

Permitted Development
Building Regulations
Planning Permission
SIPs Buildings

Information and Guidance

We have a range of technical data, installation guides and useful information on building with SIPs, to help guide clients, architects and builders.

Find out more
Order UK Annexes

How to Order from Us

If you would like to find out more, discuss a project you’re planning or request a quote, please call us on 01452 501455 or email us at [email protected], where we are on hand to discuss your plans for creating the additional space you’re looking for.

Alternatively, please complete the form to the right and we’ll be in touch.

If you would like to visit us, please call us on 01452 501455 to book an appointment.

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Case Studies


Really, really pleased with it

Really pleased with it all and enjoy sitting and taking in the view, glass of wine in hand of course! We did new decking immediately outside of it, in order to open the bi fold doors fully as an extension to the room. All in all, really, really pleased with it.

Such excellent service!

My wife and I just wanted to thank Richard, yourself and the rest of the team for all the support, ad hoc technical tips and advice that we got whilst building our Garden Room. I know that I visited the show room 2 or 3 times and Richard and the team, even though quite busy, showed us every courtesy and help. Such excellent service! I have finally completed the build of our 3 x 5m Garden Room, and we are very pleased with it.

The kit was fantastic!

Here are some pictures of my project I completed about 2 months ago, the kit was fantastic!

It’s such a good design!

We love the room and it was so easy to build. It’s such a good design!

It’s perfect and we love it!

We use it as a gym and use it most days, it’s perfect and we love it!

Great customer service and I’ll definitely be using you guys again.

Just wanted to email to thank you and your team. Great customer service and I’ll definitely be using you guys again. The driver was a really nice guy and very helpful. The build went really well and the customer was very happy.

I am very pleased with everything

I have completed the build of my DIY room that I purchased from you and I am very pleased with everything, looks really good.