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Award-winning garden rooms & annexes

Garden rooms and annexes, designed around you

The smallest deposits in the market and the UK's longest structural warranty: 30 years.

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  • 30 yrs: the longest structural warranty
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  • Small deposits to help you get started

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Annexes, offices, gyms, chill out rooms, golf simulator rooms and more. Real Urban Spaces builds, with size and guide price. Tap a build to see more.

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Offices & gyms Guide Price £57,000 +VAT St Albans, Hertfordshire (AL1)
29.8m2

Planning: Not Required

A stylish and contemporary garden room, designed to provide a versatile home office and games space for year-round use by the whole family.

Finished to a high specification, the exterior features sleek black composite vertical cladding, complemented by aluminium doors and windows. Internally, the space benefits from air conditioning and luxury LVT flooring, creating a comfortable and practical environment throughout the seasons.
Entertaining Guide Price £132,000 +VAT Harpenden, Hertfordshire (AL5)
70m2

Planning: Required

An exceptional, large-scale garden building offering over 70m² of versatile living space, designed to seamlessly combine luxury family living, entertaining and a fully equipped gym with bathroom, set within a generous private garden.

Finished to an outstanding specification, the building features a pitched roof with natural slate tiles to maximise internal height and architectural presence. The exterior is clad in sleek black composite, complemented by full aluminium glazing throughout.

Internally, the space benefits from air conditioning, luxury LVT flooring, dedicated gym flooring, and bespoke joinery, creating a refined, high-end environment suitable for year-round use.
Annexes & guest stays Guide Price £48,000 +VAT Harpenden, Hertfordshire (AL5)
24m2

Planning: Required

A fully self-contained garden studio, designed for modern guest living and short-term stays.

A beautifully designed studio space, ideal for guest accommodation or short stays, set within a compact landscaped garden with a generous decked terrace.

The layout is thoughtfully arranged to provide open-plan living, incorporating a contemporary kitchen, seating area and shower room, comfortably sleeping two people.

Externally, the studio features a sleek, modern finish, while internally it benefits from air conditioning, ensuring a comfortable environment all year round.
Annexes & guest stays Guide Price £77,000 +VAT Wimbledon, London (SW19)
30m2

Planning: Required

A high-specification, self-contained one-bedroom annex, designed for modern independent living.

A stunning garden annex offering spacious, open-plan living, complete with a full kitchen, generous living area and a large luxury bathroom.

Externally finished in contemporary vertical composite cladding, the property benefits from full aluminium glazing, while internally it features underfloor heating throughout, a high-end bathroom with walk-in shower, and a refined, modern finish across all areas.
Entertaining Guide Price £63,000 +VAT Radlett, Hertfordshire (WD7)
28m2

Planning: Not Required

A luxury multi-use garden retreat, combining wellness, relaxation and family living.

A beautifully designed space, centred around a covered hot tub area with a striking flat rooflight, creating a bright and open environment year-round.

Internally, the layout includes a built-in sauna, comfortable TV and lounge area with pool table and sofa, alongside a high-specification shower room. Finished to a high standard throughout, the space also benefits from air conditioning for year-round comfort.
Entertaining Guide Price £48,000 +VAT Harpenden, Hertfordshire (AL5)
28m2

Planning: Not Required

A spacious, high-specification garden room designed as the ultimate family and entertainment space.

A versatile and well-proportioned layout, comfortably accommodating a full-size table tennis table, with a dedicated TV area creating the perfect environment for relaxation and play.

Finished to a high standard throughout, the space benefits from air conditioning, luxury LVT flooring and a bespoke feature joinery wall. Externally, the building is enhanced with sleek black vertical cladding, striking corner glazing and a contemporary overhang, along with discreet external storage.
Offices & gyms Guide Price £61,000 +VAT Barnet, London
27m2

Planning; not required

Making the most of a narrow garden, this bespoke garden room brings together a fully equipped home gym, a relaxing chill-out space, a luxury shower room and built-in storage.

High-spec finishes include luxury flooring, air conditioning, a beautifully tiled bathroom and Sky-ready TVs. Outside, contemporary composite cladding and app-controlled smart lighting complete the modern look.
Annexes & guest stays Guide Price £66,000 +VAT Bracknell, Berkshire
29m2

Planning required: YES, Certificate of lawfulness

This beautifully designed garden studio brings together a comfortable lounge, a separate bedroom and a stylish en-suite shower room.

High-end finishes throughout include soft carpeting, vinyl flooring, air conditioning, a space-saving pocket door system and a fully tiled bathroom. Outside, dark oak composite cladding gives the studio a warm, contemporary finish.
St Albans garden office by Urban Spaces
St Albans garden office by Urban Spaces
St Albans garden office by Urban Spaces
St Albans garden office by Urban Spaces
St Albans garden office by Urban Spaces
Offices & gyms Guide Price £44,000 +VAT St Albans, Hertfordshire
24m2

Planning: Not Required

Finished to a high specification, this contemporary garden office features grey composite vertical cladding and aluminium bi-fold doors.
Harpenden garden room by Urban Spaces
Harpenden garden room by Urban Spaces
Harpenden garden room by Urban Spaces
Harpenden garden room by Urban Spaces
Harpenden garden room by Urban Spaces
Entertaining Harpenden, Hertfordshire
22m2

Planning: Not Required

Finished to a high specification, this contemporary garden room features premium black cladding and Crittall-style French doors.

Internally, a bar with a natural brass top creates a stylish focal point for entertaining, complemented by a shower room and internal store for added practicality.
Markyate gym and chill-out garden room by Urban Spaces
Markyate gym and chill-out garden room by Urban Spaces
Markyate gym and chill-out garden room by Urban Spaces
Markyate gym and chill-out garden room by Urban Spaces
Markyate gym and chill-out garden room by Urban Spaces
Offices & gyms Guide Price £44,000 +VAT Markyate, Hertfordshire
29m2

Finished in contemporary black panel cladding with smart exterior lighting, this multi-use garden room combines a dedicated gym with a relaxing chill-out space, featuring additional ceiling height for comfortable workouts.

Internally, luxury LVT flooring and air conditioning create a stylish, climate-controlled environment for year-round use.

Which Urban Space is right for you?

Urban Space · Up to 30m²

Design your own room using our configurator

Pick your size, style, windows and finishes in our 3D configurator. Ideal for offices, gyms and studios.

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Design your own room
Urban Space Plus · Bespoke, any size

Bespoke builds

Larger rooms, pitched roofs, bathrooms, kitchens, annexes and golf simulator rooms. We design it with you and handle planning.

Open-plan garden room interior with bar area and games space
Book a consultation View builds

How it works

  1. 1

    Consultation & quote

    A free consultation and a detailed, no-obligation quote.

  2. 2

    Design & planning

    Layouts, drawings and planning handled for you.

  3. 3

    Groundworks & build

    Groundworks and a fast, precise build with minimal mess.

  4. 4

    Finishing touches

    Interiors, electrics and the details that make it yours.

  5. 5

    Handover & aftercare

    Certified, warrantied and supported after you move in.

Why Urban Spaces

30 yrs Longest structural warranty

The UK's longest, for peace of mind.

48 hrs Quote turnaround

A tailored quote within two days of your visit.

In-house Our own trades

Carpenters, plumbers and electricians on every build.

Eco Greener foundations

Sustainable ground screws and low-carbon materials.

What our customers say

Open-plan garden room interior with bar area and games space

“We had a plan for a bespoke garden room made up of a separate bar/games room, gym and a bathroom, and Urban…”

Mrs C, Harpenden See the build
Modern garden room with glazed doors set within a landscaped garden

“The client was thrilled with their new annexe – the kids spent the entire summer in their “little house”. In fact, the…”

Property Owner, Wimbledon See the build
Garden annexe interior with living area and kitchenette in Harpenden

“Fab team and bespoke garden room, easy process with Donna and Chris - thanks guys.”

Client, Harpenden See the build

“Mr. B was delighted with his new garden office, providing him with a quiet professional space at the bottom of his garden…”

Mr. B, St. Albans See the build

“The family are getting lots of use from their new space and are able to relax in comfort all year-round.”

Family testimonial, Radlett See the build
Garden room with large glazed doors and outdoor seating in Harlington

“Having a studio in my garden has transformed my business and my motivation. Before, I was undertaking commercial food photography in my…”

Mr Y, Harlington See the build
Bespoke garden room installation in Barnet, North London

“I cannot recommend Urban Spaces highly enough. We are delighted with our finished garden room which looks amazing. All aspects of the…”

Mr & Mrs Wightman, Barnet See the build
Luxury garden room with timber cladding and corner glazed doors

“Chris & the team did an outstanding job from start to finish.”

Mr & Mrs Wallington, St Albans See the build
Garden office with large glazed doors illuminated at dusk in Redbourn

“We are very happy with Chris & the team at Urban Spaces who designed and built our garden office. They achieved planning…”

Mr Morgan, Hertfordshire See the build
Garden office with glazed doors set within a private garden in Harpenden

“Really enjoyed working with the whole team at Urban Spaces and what they have built us has been amazing. 9months later and…”

Mr B. Wallace, Harpenden See the build
Garden office positioned at the end of a private garden in St Albans

“It has been a pleasure working with the whole Urban Spaces team . Chris was great at creating a design which accommodates…”

Ms Purvis, St Albans See the build

Ready to start?

Design yours online in minutes, or talk to us about something bespoke.

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or call 020 3005 4936