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CS-Garden Offices

CS-Garden Offices

4.9(204 reviews)See reviews ↓·Portsmouth

About the company

CS-Garden Offices is a family-run business led by Graeme Galloway and managed by his grandson Ralph Forbes. The business was originally founded by Ralph Forbes's great-grandfather as a coldroom manufacturing company. Ralph Forbes is Director and has over 14 years of hands-on experience. Anthony joined the business in 2018 as a Design Engineer. Fi joined the team in 2020 as an Office Administrator. Scott began working at Coldstream Coldrooms in 2010 and is now Factory Supervisor.

The company uses plastisol coated galvanised steel for its structures. Its modular panels have a 75mm polyurethane insulated core with u-values of 0.13. Garden offices can be installed in as little as 5 hours. All hard work is done in house at their Hampshire based factory. The company serves Hampshire, Surrey, Dorset, Sussex and Wiltshire. The company provides garden rooms, garden offices and garages.

What customers say

Based on genuine customer reviews

CS-Garden Offices is described by customers as delivering a well-organised journey from the first enquiry through to a completed garden office, gym room or outdoor retreat. Reviewers repeatedly commend the clarity of the initial discussions, where questions were answered without delay and no pressure was placed on buyers, who instead received guidance on suitable options and a walk around the workshop.

Staff names recur throughout the feedback: Anthony is credited with explaining how the modules are made, Ralph with conducting surveys and addressing concerns, Paige with producing quotes promptly, and installation crews including Andrew, James, Reiss, Ant and Oakley with carrying out the build professionally. A point that comes up often is the pace of the work, with structures assembled within a few hours or across two days and the electrics finished soon afterwards, so the room becomes usable almost immediately.

Tidiness is another common theme, with sites cleared of debris and one account recalling a 3.6m building manoeuvred into a tight gap without causing disruption. The composite construction, regarded as requiring little upkeep, together with the standard of craftsmanship, materials and finish, draws consistent praise, as do budgets and schedules that matched what had been agreed. Communication before and after the installation, particularly updates about timing and cost, is frequently singled out as a defining strength of the service.

CS-Garden Offices — Customer photo
CS-Garden Offices — Customer photo
CS-Garden Offices — Customer photo
CS-Garden Offices — Customer photo
CS-Garden Offices — Customer photo
CS-Garden Offices — Customer photo
CS-Garden Offices — Customer photo
CS-Garden Offices — Customer photo

Reviews

Reviews are taken from publicly available sources.

LH
Lorraine Harris6 August 2026

Would definitely recommend and have no hesitation to give a positive review. Service throughout has been excellent and questions answered promptly. They helped us decide what was best for us and gave us a walk round the workshop. The building install took less than a day to complete and everything was left clean and tidy. Electrics even less time, so in two days it's ready to use.

PB
PANKAJ BAHL28 July 2026

CS-garden offices built and installed a garden office for us recently, and the whole experience was fantastic. Communication was prompt and clear throughout - every single question we had was answered on time. They gave us plenty of notice regarding installation dates and were even able to bring the installation forward by a week, which was a great bonus. On the day, the installation team arrived right on time, worked incredibly efficiently, and completed the build in just 6-7 hours, followed by the Electrics setup. Highly professional service from top to bottom. I would highly recommend.

CS
Claire Sloman17 July 2026

Can not recommend C S Garden offices enough. They have been very responsive to our emails with many requests to ensure we received an office to suit our needs. The guys installing were lovely and installed our office efficiently paying attention to detail. Can’t wait to move in!

TA
Thangaraj Arumugam22 May 2026

Great work by the team here. Anthony was kind enough to show and explain the manufacturing process. Ralph did a timely onsite survey. Admin team kept us updated on the schedule and cost. Installation team was fantastic, ensured we were okay on every little thing. No pressure on sales, rather guided us on the process and what's good for us as customers. 'Doing it right the first time' is important for prefabricated modules and CS Garden offices team delivered a fantastic job. Highly recommended.

MG
Mick Gowers16 April 2026

Absolutely fantastic service from start to finish. The lads arrived on time and got on with the job. They were checking with us to make sure we were happy with everything. Job completed in less than half of day. There was nothing to much trouble. We had to put the job back a few months due to health problems but for Antony in the office this was not a problem. Will have no hesitation in recommending CS gardens to anyone. Thank you all.

AB
Adrian Ball12 March 2026

We chose our garden room following significant research, surveys and quotes from other suppliers but none could beat the quality of materials and competitive price offered by CS-Garden Offices. In particular, the long lasting, insulated metal construction was ideal for our need for storage of environmentally sensitive medical equipment. The whole process of selection through the configurator and adjustment of quotations was straightforward and communications have been excellent throughout with weekly updates. The installation was trouble free onto a prepared based using compacted MOT Type 1and gravel filled grids, completed in a day with great attention to our requirements by the team who were timely, polite courteous, patient and efficient. The quality of the finished office is great and we have no hesitation in recommending CS-Garden Offices, we would definitely use them again.

EJ
Elliott Jones24 February 2026

A very efficient build and high quality room. Everything was discussed with the team and laid out easily. The electrician had to deal with our houses awkward electrics too. Would highly recommend, especially for working from home people. (Picture is before lighting was installed)

Garden rooms & offices in Portsmouth compared

Ordered by rating, weighted by the number of reviews — businesses with only a handful of reviews do not jump to the top automatically. 10 businesses in this category in Portsmouth are compared.

RankProviderRatingReviewsOpen Sat.
1Johnsons Garden Buildings Gosport★ 5,050Yes
2Great Garden Rooms★ 5,036Yes
3Cedar Lodge Garden Rooms LTD★ 5,028Yes
4CS-Garden Offices (this page)★ 4,9204No
5Elfords Ltd★ 4,960Yes
Contact
+441329285563www.cs-gardenoffices.co.uk104 Fareham Rd, Gosport PO13 0BA
Working hours
Monday08:00–16:30
Tuesday08:00–16:30
Wednesday08:00–16:30
Thursday08:00–16:30
Friday08:00–15:30
SaturdayClosed
SundayClosed