I couldn't afford more than a broom cupboard to set up office in.

我的钱也就够搞一间鸡窝大的办公室。

《牛津词典》

Picking one door at random out of several, I walked into a broom cupboard.

我随意打开几扇门中的一扇，想走进去找自己要吃的东西，但里面却是一个放扫帚的储物柜。

youdao

No space to think in that broom cupboard. Is it safe for you to be here?

在那样的扫帚柜里没有空间思考。你来这儿安全吗？

youdao

And then there is its crowning glory: a wireless broadband digital home entertainment system, installed by Abrocour with a digital kit of parts from Microsoft and Intel, among others, and a BT broadband connection in the broom cupboard.

BBC: Home of the future mock-up