Skip to content
MBS Group
Get a Quote
A mono-pitch SIP home clad in black vertical timber at dusk, with lit windows and a gravel pathCGI design visualisation

SIP Homes
and Annexes.

Permanent SIP homes, self-builds and garden annexes, designed to Building Regulations. Warm, quiet and full of light, with low running costs from the day you move in.

Get a QuotePractical Guidance

A Permanent Home, Built a Better Way.

Every MBS home is designed to Building Regulations and built around the same high-performance SIP envelope as our lodges.

  • Self-buildersA high-performance permanent home, designed around your plot and the way you live.
  • Family annexesA granny annexe or independent space for relatives, close to the main house.
  • LandownersA permanent home on your own land, designed to suit its setting.
  • Rural businessesAn on-site dwelling for the people who run the business.
  • Staff and rental housingWarm, efficient homes that are economical to run and maintain.

Why Live in a SIP Home.

Low Running Costs

Exceptional energy efficiency, thanks to a continuous, highly insulated envelope.

Warm, Quiet, Draught-Free

Airtight construction keeps the temperature steady and the outside world at a distance.

Light-Filled Living

Open-plan rooms with vaulted ceilings and large areas of glazing.

A Faster Build

Factory-made panels mean a faster build programme than traditional construction.

Strong and Durable

A rigid, robust structure built for the long term.

Before You Build, Know Your Route.

Three things that shape most residential projects. We'll help you understand each one for your site.

General guidance only, not legal, planning or financial advice. Please do your own due diligence.

Planning & Finance Guide

Mortgages and Warranties

Self-build mortgage lenders almost always require a 10-year structural warranty. We'll work with your lender and your warranty provider.

Annexes and Planning

An annexe is usually treated as ancillary to the main house, and planning will look at how the annexe is used.

New Homes in Rural Wales

In rural Wales, new homes in the countryside are generally tied to a rural enterprise under Welsh planning policy (TAN 6). We'll help you understand your route.

Interiors That Feel Like Home.

Open-plan living under vaulted ceilings, finished in one of our collections or to your own brief.

Willow and Stone interior with a stone fireplace, wood-burning stove and olive shaker kitchen
Willow & StoneClassic style with natural textures and rich detailing.
Nordic Luxe interior with a grey shaker kitchen, inset fire and full-height glazing
Nordic LuxeClean lines and a calming neutral palette.

Home Questions, Answered.

All FAQs

Self-build mortgages are available for SIP homes. Lenders almost always require a 10-year structural warranty, and we'll work with your lender and warranty provider.

SIP homes are designed and built to Building Regulations, with a strong, rigid structure built for the long term.

Factory-made panels mean a faster build programme than traditional construction. Your overall timeline depends on design, planning and your site, and we set out a programme at quote stage.

Often, yes. Annexes are usually ancillary to the main house, and planning will look at how the annexe is used. We can advise on your route.

Our homes are designed to Building Regulations, and we guide you through what is needed for approval.

Start Your Home With Us.

Tell us about your plot and what you'd like to build, and we'll come back with ideas, guidance and a personalised quote.

Get a Home Quote07538 104444