Main gatehouse building

Unique modular building designed to blend in with the original architecture

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Gatehouse during installation

This stunning outdoor building enhances it's setting even during installation

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Bereavement Counselling rooms

Additional sound insulated internal partitioning forms separate rooms, with adjoining acoustically insulated door

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Stunning internal office space

Get creative in your outdoor office space

Exterior view of glazed entrance

Create the "wow" factor for your visitors with this fully extended glazed area

Private and discreet therapy rooms

Work confidently with your clients as they relax in this tranquil space

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Fully finished stunning interiors

Stay with this amazing finish or use it as a blank canvas to create your own energy

Modular Office Buildings

Whether you need extra meeting rooms, show-home offices or a healthcare therapy centre, our robust and highly sustainable modular office buildings have incredibly fast build times. For more information, simply call us today!

Creative Solutions for Work Space Dilemmas!

Manufactured at our own factory, our modular office buildings are the ideal solution and can even be constructed off-site, then craned into position in less than one week! All our modular designs can be customised so the prices below are there to provide you with example costs (excluding VAT). Costs typically range from £40 - £500k depending on the size, specification, site access and availability of services, with buildings ranging in cost from £150 to £300 per square metre. For a free no obligation quote for your commercial project, feel free to contact a member of the team!

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Housing development sales office floor plan

Housing development sales office

Example price: £75,000

Fully modular, relocatable building delivered in 2 sections and commissioned in 2 days, including kitchen & WC with classic Cedar cladding.

Width 8.68m
Depth 4.68m
Internal Height 2.4m

Security gatehouse photo

Security gatehouse

Example price: £62,000

Completely modular relocatable building landed on site in 1 day, including kitchen, WC and fully bespoke detailing.

Width 6.00m
Depth 3.67m
Internal Height 2.4m

Hospice counselling room photo

Hospice counselling room

Example price: £40,000

Flexible space comprising small office and larger meeting room, erected on site as a permanent installation.

Width 6.8m
Depth 4.00m
Internal Height 2.4m

The buildings are everything we could have hoped for in a work space. Your staff kept in regular touch and you delivered everything we asked. Everyone including the CEO loves the finished buildings

Paul Raymond, Estate Manager - St Margaret's Hospice, Taunton

Standard Specification

Our outdoor buildings are practical for any commercial property. The following robust features are included within all modular office buildings as standard. Also have a look at our extra features that you may want to consider!

Standard specifications


Aluminium Windows And Doors

We understand the need for robust, high-traffic doors and windows, built to last and with low maintenance. That’s why we offer you robust, hard wearing powder coated aluminium frames as standard. All doors and windows feature compliant wheelchair access, anti-finger trap hinges, laminated safety glass and window opening restrictors as standard


Foundations Included

We use two different foundation systems, each of which does not require poured concrete or invasive mechanical excavation. Our foundation systems are well suited to challenging locations, especially where Tree Preservation Orders would otherwise restrict building works. Final foundation design is completed by our Structural Engineers, to suit your ground conditions and building design.


Robust Roofing System

Like all the other parts of our outdoor buildings, our roofs are built to last. For our contemporary mono-pitch roof designs, we use a Firestone EPDM flat roofing system which comes with a 20 year manufacturer’s warranty and 50 year life expectancy. On pitched roofs, we offer a range of roofing finishes including EcoSlates, Cedar shingles, recycled Welsh slate tiles and indeed any kind of roof tile or slate in keeping with your local vernacular.


SIP Panel Construction

Fabricated off-site in our Hertfordshire factory, our outdoor modular buildings are constructed using ‘Structurally Insulated Panels’. The SIP construction maximises internal space within the building, without compromising on insulation or structural integrity. The off-site construction allows a rapid site build process to minimise any disruption within the workplace environment.

Western Red Cedar390x190

Western Cedar Cladding

Stylish, robust and sustainable, Western Red Cedar is the ideal choice for cladding modular office buildings. This natural resource is practically maintenance free, so there is no need for any chemical preservatives to help create a simply beautiful exterior. Our timber only comes from sustainably managed forests and other equally durable wooden cladding materials are available.

Additional features

Sliding folding doors commercial


A set of sliding folding doors is a perfect way to let the 'outside in'. Fabricated from robust aluminium, the doors come with a 10 year manufacturer’s warranty and can be used as a single "traffic" door when not opened fully.

Commercial bathroom


For a completely self-contained room, we can install toilets, kitchens and bathrooms. These can either be connected to your mains systems, or can be "off-grid" utilising self-composting toilets and sinks with a self-contained, low use water supply.



Being Green Modular, we of course offer green Sedum roofs as an optional upgrade! Designed to be low maintenance and drought resistant, opting for a living roof will give your outdoor commercial building a spectacular finish.



Many clients choose to increase the usable space of their building by adding an additional decking area. Our decking systems use recycled hardwood composites to provide a durable, slip-resistant surface that is sustainable and environmentally friendly.

Customised Electrical Systems


We can integrate phone systems and network cables into our SIP panel design hiding them from view. We can also install air conditioning; external lighting and even a remote smartphone controlled system that lets you switch your room on with a swipe of your finger!

IMG 0952 Alconbury Weald enterprise park from Kate Gatehouse 1 10


We are also able to offer you self-coloured rendered finishes, as well as powder coated aluminium cladding or even brick. To maintain a "natural" look we recommend variations on the style and feel of the Western Red Cedar cladding and can show you a range of alternative, durable timber finishes.

We wanted an aesthetically pleasing building to create an attractive first impression. We choose Green Modular because they are experts in design, who provided us with a custom made building that matched the existing gatehouses in design and colour. We would use them again and recommend them to anyone planning a similar project

Tom Baker, Project Surveyor - Urban & Civic