Granny Annexes for Home

Sustainable and Cost-Effective Habitable Garden Annexes Beautifully Built with SIPs

Hanley Two-Bedroom Annexes
The Ledbury 1-Bed Annexe
Malvern Two Bed Annexe
Welland One Bedroom Annexes
Hanley Two-Bedroom Annexes
The Ledbury 1-Bed Annexe
Malvern Two Bed Annexe
Welland One Bedroom Annexes

Granny Annexes Efficiently Built with SIPs

If you’re looking for beautifully designed, habitable space for members of your family, our range of one and two-bedroom granny annexes offer stylish space, a range of features, a choice of finishes and reduced energy costs.

All of our prefabricated annexes are architecturally designed and are built using our pre-manufactured SIPs system; an innovative method of construction that delivers sustainable, time-efficient and cost-effective builds.

Our annexes are designed to comply with BS3632 or Part L of Building Regulations.

SIPs (structural insulated panels) are a modern and efficient method of construction that utilise off-site manufacture, and are suitable for a wide variety of uses, from small ancillary buildings to large construction projects.

Our panels are fabricated off-site to exacting standards at our purpose-built manufacturing facility, using the highest quality closed cell EPS insulation and FSC certified and structurally graded orientated strand board.

As one of the leading suppliers of SIPs, we specialise in offering homeowners, businesses and organisations the opportunity to add the space they need and take advantage of the benefits of building with SIPs.

The Benefits of Building with SIPs

Annexe
Faster Construction Speeds

The pre-manufactured nature of SIP panels offers a significantly reduced site installation time in comparison to traditional construction methods such as masonry or timber framing.

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Annexe
Reduced Energy Costs

SIPs are very airtight in its construction and with less timber required than traditional timber frame construction, there is a vast reduction of cold bridges in the wall build up and less energy is needed to heat and cool rooms.

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Annexe
Lower On-Site Costs

Due to the stringent, tried and tested design and manufacturing process, materials work harmoniously together, delivering a highly predictable and reliable product whilst minimising construction waste and labour costs.

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Annexe
High Structural Performance

The composite construction of SIP panels offers enhanced structural performance, strength and stability that does not degrade in comparison to traditional construction methods.

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Annexe
Lightweight Prefabricated Structure

SIPs construction is an incredibly strong, yet lightweight system. This minimises disruption on site, utilising low impact footings (where conditions permit), requiring less labour and allowing for easier handling.

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Prefab Garden Annexes UK

Our Service

We offer a complete service, which includes groundworks^, full structural calculations, Certificate of Lawfulness* or Householder Planning Permission, installation and finishing, based on one of our four annexe models.

We take a parallel approach to gaining planning permission^^ for annexes. We can apply for both full Planning Permission and a Certificate of Lawfulness under The Caravan Act: an approach that offers the strongest prospect of achieving planning permission.

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. 

Flat Pack Annexes
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 prefab garden annexes include the following specification, as standard:

  • Certificate of Lawfulness* or Householder Planning Permission^
  • Concrete Pads or Ground Screws
  • Services Installed up to 10m from edge of Annexe^
  • Main Construction in SIPs
  • Cedar Cladding/Render to 2 Sides and 2 Sides Box Profile Metal Sheeting in Anthracite
  • UPVC Windows and Doors
  • SPC Flooring
  • Full Interior Decoration
  • One or Two Bedrooms
  • Bath/Shower Room
  • Kitchenette
  • Sockets and Switches
  • Electric Underfloor Heating
  • Wall Mounted Heaters to Bedrooms
  • 120 Litre Immersion Tank
  • Smoke Detectors
  • External Decking
  • Internal and External Downlights

**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. 

Our Annexe Models

One Bedroom Annexes
One Bedroom Annexes

Our range of one bedroom granny annexes includes four stylish models, all featuring glazing that allows natural light to fill the open-plan kitchen/living/dining room and a spacious ensuite bedroom with natural light.

Two Room Annexes
Two Bedroom Annexes

Our spacious two bedroom granny annexes have been designed to sit harmoniously in their surroundings, whilst allowing views of the outside to be enjoyed from all areas and natural light to fill every room.
Hanley 2 Bedroom Annexe
The Hanley

The Hanley annexe offers a living space that allows natural light to flood in through sliding doors and floor to ceiling glazing, with one ensuite bedroom or two double bedrooms and a utility room in the larger two bedroom model.
Ledbury Annexe Model
The Ledbury

The Ledbury annexe models feature a spacious L-shaped design with one ensuite bedroom or two double bedrooms with a bathroom and utility room and a triple aspect open plan living space with glazing that allows natural light to flood in.
Malvern Granny Annexe
The Malvern

The Malvern annexe has been designed to offer light-filled open plan living that extends out, with sliding doors that allow natural light to flood in and either a spacious ensuite bedroom or two double bedrooms, both with ensuite shower rooms and a utility room.
Welland Model
The Welland

The Welland one and two bedroom annexe models have been designed to sit perfectly in a longer garden, with a dual aspect kitchen/living/dining room at the front and a spacious double ensuite bedroom or two bedrooms and two bathrooms at the rear.

Technical Information

Insulation

Our panels are constructed using enhanced grey EPS insulation. EPS is an inert material that will not off-gas or degrade over time, unlike PIR and PUR insulations, resulting in thermal performance that will remain consistent over the lifetime of the building. The enhanced grey EPS used in our panels is a closed cell structure and offers far superior thermal resistance values over standard EPS, with a water permeabilityof 0.015 to 0.030 mg(pa.h.m) and a thermal conductivity value of 0.032 W/mK

Structural Performance

Our wall and roof systems have been fully tested to British Standard and Eurocode loadings for domestic buildings. Each bespoke project will have a full structural design and structural appraisal from a third-party engineer, using the structural load testing data.

Standard Details and U Values

We have a range of standard details to assist and guide clients, architects and builders in the understanding and application of our SIPs wall and roof systems. Our thermal values are tailored towards ‘new thermal elements’ required for home extensions and ancillary building, including home annexes. U values are calculated on the complete wall or roof build up and these can be enhanced further with additional internal insulation, if required.

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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Reviews

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.

Permitted Development, Planning Permission and Building Regulations Information

Permitted Development
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Building Regulations
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Planning Permission
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Our Group Products

Granny Annexes For Home
Annexes for Home
Annexes For Work
Annexes for Work
Annexes For Leisure
Modular Leisure Buildings
Welland 1-bedroom Annexe
Flat Pack Annexes
Modular School Building
Modular School Buildings
DIY Garden Room Kits
DIY Garden Room Kits
Installed Garden Rooms
Installed Garden Rooms
structural insulated panels - SIPs
SIP Panels
Modular Pods
Pods