More-Permanent Buildings

Photography of a Semi-Permanent Building.

Characteristics of a permanent building without the wait

Our sturdy temporary buildings are often in place for many years, even decades, perhaps why many call them "semi permanent" as they simply outlive the perception of 'temporary'. We offer a far more permanent & clearly different design for genuinely long term needs, or when performance must be higher. Still bolt-down, so no digging required and relocatable (but usually concreted in), these buildings can still often be retro-fitted to an existing concrete surface, but it does need to be concrete and of suitable condition.

Our all-steel buildings are considerably more robust and suited to far more demanding applications or higher expectations, but take longer to deliver, have a higher initial investment and may well require ground-works, or at least be a very good idea for you to choose groundworks. In return our all steel buildings are much higher specification, better in service and will more than pay for themselves over a fraction of their lifetime, making excellent warehouses, chilled storage, steel workshops, logistics, factory extensions, assembly/production areas, integrated modular building extensions etc.


Heavyweight all-steel structures.

Whilst available with just a cladded steel exterior, sandwich panels perform much better and allow proper sealing, insulation and many options for fire resilience and acoustic muffling etc.

Steel roofs don't need replacing like the PVC versions used in temporary buildings, offering a considerably longer life expectancy (and lower maintenance) and guaranteeing the contents stay completely dry, better maintaining the temperature and strong enough to support fixtures.  An all-sandwich panel (SIP) exterior, including the roof, is the only choice if you want to reliably prevent condensation and be fully insulated, reducing running costs and allowing economical chilled storage, temperature regulated, climate controlled or high care environments.

Whereas temporary buildings can be standard, 'off the shelf' quick projects, steel frame buildings are specifically designed (with structural engineering calculations provided for each building) according to sizes, requirements and their location, so entirely bespoke sizes and even shapes are no problem. A standard sized rectangle doesn't suit all yards after all, so if you really need a triangle, rhombus or customised design, we can probably help. If in doubt, please ask!

Black Metal Cladded Semi-Permanent Building.

Steel sandwich panel exterior buildings can come with a “no leak guarantee” unlike their temporary building counterparts, which are weatherproof but due to having PVC roofs (and just sitting on an existing hard surface), can’t be guaranteed waterproof.


These buildings can be specified to high levels of insulation, unlike the PVC roof alternative (suppliers who only offer a PVC roof and/or aluminium frames may say otherwise), greatly saving on running costs and allowing any high care standards which customers must adhere to.


Wall panel thickness, type and composition can be varied to suit the application and customer / insurance needs, e.g. LPCB standards requiring highly fire resilient cladding.


These buildings are well suited to sites where harsh or adverse weather conditions prevail, such as windy coastal, off shore or higher altitude locations (aluminium frames are usually only compliant to 100m above sea level ASL).


Already achieving far higher Wind Return Periods (WRP) than aluminium frame buildings, they can be designed to support weighty internal and/or external fixtures & fittings - and implemented as a turnkey project solution or just the building shell.


The general rule of thumb is the less ‘temporary’, the more ‘proper building’ options you can have e.g. skylights, solar panels, fire sprinklers, HVAC, fume extraction, air purification etc.


Heavier weight buildings that take longer to construct but designed as permanent.

They require more of a site which often means ground-works, but we aim to suit to customers' requirements, situations and budgets. Surfaces need to be sufficiently strong, ideally flat & level - the best site is a location that’s previously supported a building. Proper drainage & water management is necessary, especially to achieve performance & functionality akin to a traditional building, even though faster & cheaper to erect.

Semi-Permanent Building Construction.

The benefits of more-permanent buildings

A photography of an all steel semi-permanent building from BigBox Buildings.

Design, specification, materials and site preparation:

  • Our more permanent buildings offer far more security from the weather, pilferage, damage and fire - so better performance, compliance and peace of mind.
  • They are often more suitable and desirable from a performance, longevity, aesthetic and owned-site perspective.
  • When size matters a steel frame allows an actual warehouse size; no need for several smaller buildings stuck together (you’d need multiple aluminium framed temporary buildings where a single steel frame building could do it, thus keeping the full area clear-span using steel).
  • Construction time and cost are lower than a new traditional build – investment levels are lower, saving the need to raise as much finance.
  • Enjoy the efficiency of having your operation all together in one place, rather than renting offsite storage with the associated transport cost and inconvenience.

Building Options

Lack of space can adversely affect the development of your business. Big Box Buildings provide temporary, semi and permanent buildings as a lower cost, lower risk, swifter build realistic option...


Temporary buildings are popular, quick and versatile whereas our more permanent buildings will do almost anything a traditional building can be used for. We offer a full turn-key solution if required, including integration with existing buildings, ground-works, no-leak guarantee and wide range of fixtures and fittings...

BigBox World

Who are Big Box Buildings? Want to get in touch, or see some of the projects we've been involved in recently…