Broadstone lies close to the small village of Gateside in North Ayrshire, Scotland about half a mile east of Beith in the old Barony of Giffen.
| Broadstone Castle | |
|---|---|
| Barrmill, North Ayrshire, Scotland UK grid reference NS4084831699 | |
 Broadstone Hall near the site of the old castle | |
  Broadstone Castle | |
| Coordinates | 55°44′33″N 4°36′39″W / 55.7426°N 4.610883°W |
| Type | Tower |
| Site information | |
| Owner | Private |
| Controlled by | Clan Montgomery |
| Open to the public | No |
| Condition | Removed |
| Site history | |
| Built | 15th century |
| Built by | John de Liddel |
| In use | Until 18th century |
| Materials | Stone |