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Garden Rooms, Annexes and Extensions Across Scotland

Garden Rooms Built for Scottish Weather.

Offices, gyms, studios, annexes and extensions, built on solid concrete, fully insulated and finished with a one-piece rubber roof. Designed and built by our own team, anywhere in Scotland.

Or call free on 0800 012 5036

  • From £9,411Caden Garden Rooms
  • 10-Year WarrantyStructural and Insurance-Backed
  • Free Site SurveyPlus a Free Quote
  • Four ShowsitesGlasgow to the Highlands
A cedar-clad Caden garden room on a frosty morning, its anthracite bifold doors folded right back and the downlights glowing in the canopy
A Caden on a Frosty Morning

Our Ranges and Prices

Four Ways to Gain a Room

Every OBG building is designed around your garden, your house and what you need the space for. Start with the one closest to your idea and we’ll shape it from there.

A Caden garden room in vertical cedar cladding with glazed doors, standing on a dark composite deck with a table and chairs

Garden Room

Caden

Our classic garden room: one bright, open space with wide glazed doors, ready for work or play.

  • Home Office
  • Gym
  • Studio

From£9,411

A Jacob L-shaped garden room in horizontal cedar cladding on a frosty morning, with full-height glazing and steps up to a deck

L-Shaped Garden Room

Jacob

Two spaces in one L-shaped building, for households that need more than one room in the garden.

  • Office and Gym
  • Two Workspaces

From£17,820

A Kai extension in vertical cedar cladding built onto the back of a white rendered house, with tall anthracite windows

Home Extension

Kai

A modern extension built onto your house, clad in cedar, composite or brick.

  • Living Space
  • Dining Room
  • Playroom

From£12,777

A large single-storey cedar garden building with wide bifold doors and a covered corner, on a sandstone patio

Garden Annexe

Outdoor Living

A complete annexe in the garden, for family, for guests or for care at home.

  • Granny Annexe
  • Guests
  • Care at Home

From£34,742

Starting prices. Every building is designed and priced to your size and specification after a free site survey.

How We Build

Four Seasons Before Lunch? Built for Every One of Them.

Scottish weather finds every shortcut, so we don’t take any. Pick the weather and see what’s protecting you.

Cutaway drawing of an OBG garden room: concrete base, insulated floor, walls and roof, a one-piece rubber roof and cedar cladding, shown in the weather you pick One-Piece Roof Concrete Base Warm Insulation Modified Cedar

Inside: Warm and Dry

In a Downpour

One-Piece Rubber Roof

Every roof is finished with a Firestone rubber membrane laid in one piece, so there are no joins for the rain to find. It needs no maintenance and it keeps the room warm in winter.

The edge of an OBG roof: the rubber membrane dressed over the top and the cedar fascia and soffit below
The Membrane Dressed Over the Edge, Cedar Fascia and Soffit Below
The Shortcut We Skip

Felt and tin roof coverings. They have joins that can leak, and they aren’t made for Scottish weather.

In a Gale

Solid Concrete Underneath

Every OBG room stands on a solid concrete foundation, the same method used for house builds and home extensions. It suits every kind of ground and stays solid and stable in any weather.

A new concrete base in a garden with the timber floor frame laid out on it and the first wall panel standing
The Concrete Base Goes Down First, Then the Frame
The Shortcut We Skip

Ground screws. Quicker and cheaper, but not suited to every type of ground, open underneath to vermin and often fitted by a subcontractor.

In a Frost

Warm When It’s Freezing

Fully insulated, with plasterboard walls and a painted finish, laminate flooring on foil-backed underlay to keep the cold away and an energy-efficient heater on a 7-day programmer. Built to be used all year round.

Frost on the glass beside the handle of an anthracite garden room door
Frost on the Glass, From Our Winter Photo Shoot
The Shortcut We Skip

Fixed-size, shed-style kits that are poorly insulated and cold in winter.

On a Dreich Day

Cladding That Stays Put

Our New Zealand and redwood cedar is thermally modified at 230°C to keep the timber stable. It’s virtually knot free, with a low moisture content, and it needs no maintenance.

Close-up of horizontal cedar cladding boards around a slim anthracite window
Cedar Boards Around a Slim Anthracite Window
The Shortcut We Skip

Siberian larch. It needs treating, it can crack and it carries large knots.

“The first day they arrived it was a lovely frosty day, but then the second day it rained, and it was really really difficult, but having said that they coped admirably.”

Karen, on the build of her skin clinic in Hamilton

Standard in Every Room

No basics left as extras. Every OBG garden room comes with all of this.

Price My Room
  • Solid Concrete Foundation
  • Warm Insulation
  • Plasterboard With a Painted Finish
  • Laminate Floor on Foil-Backed Underlay
  • Double Sockets With USB Ports
  • Armoured Cable to Your Mains, Up to 20m
  • Energy-Efficient Heater on a 7-Day Programmer
  • Exterior Downlights and Six Interior Spotlights
  • Firestone One-Piece Rubber Roof
  • 10-Year Insurance-Backed Structural Warranty

Who Builds It

One Team From First Drawing to Handover

We’re a family-run Scottish company with more than ten years in the industry. Our own tradesmen build your room, and we’re responsible for every part of it.

  • Designed In-HouseOur drawing and design team plans every room around your garden and the way you’ll use it.
  • Built by Our Own TradesBuilt on site from the concrete up, which also suits gardens with awkward access.
  • One Point of ContactYou’ll have your own direct point of contact throughout your installation.
  • Responsible for Every PartFrom the foundation to the last spotlight, every part of your building is ours to get right.
The Outdoor Building Group team standing outside one of their cedar garden rooms

Customer Stories

Real Rooms, Real Reasons

Clinics, offices, studios and annexes. A few of the rooms we’ve built for people across Scotland.

Karen’s skin clinic in Hamilton: a cedar garden building with wide glazed doors, a whisky barrel planter and a bistro table on gravel

Karen, Hamilton

A Skin Clinic, Built to Her Brief

Karen visited our Glasgow showsite, chose a cedar-clad building for her clinic and found the idea for its toilet area there.

It’s a great team of guys, very impressed with the whole company. Read Karen’s Story
Sandra’s garden annexe in Aberdeen: a cedar building with glazed double doors at the end of a paved path

Sandra, Aberdeen

An Annexe Close to Family

Sandra sold her large home in Aberdeen to live near her daughter. We designed her annexe around her wheelchair, with a wider WC door and non-slip flooring, and went from design to handover in six weeks.

Read Sandra’s Story
Pam’s garden office in Edinburgh with the bifold doors open onto a desk, rocking chair and sofa

Pam, Edinburgh

An Office Down the Garden Path

Pam works from home in IT for a city bank. She looked at an extension, but the cost, noise and build time didn’t seem worthwhile. Her 5m by 3m garden office has bifold doors, a corner window and a desk that faces the garden.

Read Pam’s Story
John’s 3m by 3m Caden music room in Cumbernauld, doors open onto his studio desk and speakers

John, Cumbernauld

A Studio for an Award-Winning DJ

John needed a place to make music away from the house. His 3m by 3m Caden has our acoustic pack, which isn’t soundproof but reduces sound by up to 45dB, and room for all his recording equipment.

Read John’s Story

How It Works

From First Call to Finished Room

  1. Tell Us Your Idea

    Fill in the form or call free on 0800 012 5036. Tell us what the room is for and roughly where it would go.

  2. Talk It Through

    A design consultant calls you to talk through the size and specification.

  3. See It and Measure Up

    Visit a showsite to see the quality for yourself. An estimator then visits your home to measure up, and the site survey is free.

  4. Free Quote, Then We Build

    You get a free quote. If you go ahead, our team builds your room, starting with the concrete base.

Showsites

See It, Sit in It, Then Decide

Photos only go so far. At our showsites you can walk into fully finished, furnished garden rooms, open the doors and get a real feel for the sizes and the build quality. The tea, coffee and biscuits are on us.

Our sales team is in Monday to Friday, 8am to 4pm, and Saturday, 10am to 1pm.

FAQs

Good Questions, Straight Answers

Can’t see yours? Call free on 0800 012 5036 and ask a real person.

How Much Does a Garden Room Cost?

Our ranges start from £9,411 for a Caden garden room, £12,777 for a Kai extension, £17,820 for a Jacob L-shaped room and £34,742 for an Outdoor Living annexe.

Every building is designed around your space, so the price depends on the size and specification. We’ll give you a free quote after a free site survey.

Do I Need Planning Permission?

Many garden rooms don’t need it, but it depends on the size and height of the building, where it sits in your garden and your property.

Our in-house architectural technicians will tell you what applies to your plans and guide you through an application if you need one.

Will It Be Warm Enough in Winter?

That’s what our rooms are designed for. Every one is fully insulated, with plasterboard walls, a painted finish, laminate flooring on foil-backed underlay to keep the cold away and an energy-efficient heater on a 7-day programmer.

What Do You Build It On?

Solid concrete, every time. It’s the method used for house builds and home extensions, it suits every kind of ground and it stays solid and stable in any weather. We don’t use ground screws.

What Comes as Standard?

A concrete foundation, warm insulation, plasterboard with a painted finish, laminate flooring on foil-backed underlay, double sockets with USB ports, an armoured cable connection to your mains (up to 20 metres), an energy-efficient heater with a 7-day programmer, exterior downlights, six interior spotlights and a Firestone one-piece rubber roof.

Popular extras include composite decking, a skylight, water and waste connections, an internal wall, a wired internet (Cat 6) connection, extra overhangs, hard landscaping and artificial grass.

How Long Does It Take?

It depends on the size of the building and the weather on the days we build, so we’ll give you a timescale with your quote. As a guide, Sandra’s annexe in Aberdeen went from design to handover in six weeks.

Can I See One Before I Buy?

Yes, and we’d recommend it. Our showsites have fully finished, furnished garden rooms you can walk into. Drop in to our Glasgow showsite, or call to arrange a visit to Aberdeenshire, Perthshire or the Highlands.

Do You Cover My Area?

If you’re in Scotland, yes. We build across the whole country, from Ayrshire, Dumfries and Fife to Inverness, Fort William and the Isle of Mull.

Who Actually Builds It?

We do. Our in-house design team draws your room, our own trades build it on site and we’re responsible for every part of it. You’ll have your own direct point of contact throughout your installation.

What Warranty Do I Get?

Every building comes with a 10-year insurance-backed structural warranty.

Free Quote

Get Your Free Quote

Tell us a little about your plans. A design consultant will call to talk through the size and specification, then we’ll arrange your free site survey.

  • Free site survey and free quote
  • Your own point of contact throughout your installation
  • 10-year insurance-backed structural warranty
Rather Talk It Through? 0800 012 5036

Freephone. Monday to Friday 8am to 4pm, Saturday 10am to 1pm.

info@outdoorbuildinggroup.co.uk

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