* Taigh beag: This is the most straightforward translation. "Taigh" means house and "beag" means small or little. This is generally a good option.
* Tigh beag: This is a variation of the above, using "Tigh" which is an alternative spelling of "Taigh". Both are acceptable.
The choice between them is largely a matter of dialect or personal preference. There's no significant difference in meaning.