ARC I: our smallest modular building

The ARC I is our smallest width eco-building. It can be used for any type of building requirement, though the smaller width size lends itself to more intimate or private activities such as therapy and consulting rooms, yoga and wellness spaces, holiday homes and other accommodation, and small offices or luxury garden rooms.

For larger, public spaces that have a higher footfall, see our ARC II model.

The choice between the ARC I or ARC II is usually led by the overall requirements of the space, as well as the available space within the plot of land.

ARC I buildings can be single pod-style units, or can be built to any length using Green Unit’s modular design and build process.

They can also be connected as a series of buildings, linked in a number of ways, for instance in L, T, or H shaped formations.

ARC I – Key dimensions

The key internal and external heights and widths of our ARC I model are outlined below. Heights and widths of our modular ARC structures don’t change, but all of our buildings can be built to any length.

Internal dimensions

  • Internal floor width 4.0m
  • Internal height 2.4m (at highest point)
  • Internal width 4.8m (at widest point)

External dimensions

  • External footprint width 4.5m
  • External width 5.4m (at widest point)
  • External overall height 3.2m
  • External height 2.7m (based on ARC floor at ground level, with foundation base 0.5m below ground level)

The dimensions of the ARC I have been designed for ease of transportation and to minimise waste during the production process.



Our budget indicative costings are the same whether you choose an ARC I or ARC II modular building as pricing is calculated per sqm. We provide indicative guide prices initially, and can provide a custom quotation at the point of engaging in a design consultation.

Contact us

Speak to the team

01865 682707

[email protected]

  • Please give us as much information as possible, where available: the number of units required; approximate size/usage of the units required; the location of site(s); whether you have already explored planning permission for your project; and whether you will need to raise finance for the project.
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