Knockhall preserves a tall sixteenth-century tower house, parts of its defensive courtyard and the story of a residence lost to accidental fire.
Quick facts
- Date
- 16th century; lintel dated 1565; later 17th-century alterations; burnt 1734
- Architect / designer
- Built for the Udny family; designer unrecorded
- Type
- Fortified L-plan tower-house ruin with barmkin
- Designation
- Scheduled monument (SM5577)
- OS grid reference
- NJ 99358 26458
Architecture, archaeology and continuing use
Rubble walls stand close to roof height around an L-plan house with a projecting stair tower. Vaulted ground-floor rooms, gun loops, garderobes and a barred-door slot survive, with a round tower in the former southern enclosure.
Its story
The entrance lintel bears 1565. The Udny family held the castle, though Covenanter Earl Marischal captured it in 1639. Late seventeenth-century alterations preceded an accidental fire in 1734 that left the building ruinous.
Why it is included
Scheduling recognises a well-preserved fortified residence whose main tower, barmkin and separate round tower retain evidence for elite domestic and defensive life in early modern Scotland.
What to notice
- The re-entrant entrance and dated lintel.
- Gun loops and the former sliding-bar socket.
- Foundations of the round corner tower in the enclosure.
Reading the surroundings
Do not enter the ruin or cross farmland without permission. Standing walls, collapsed vaults and loose masonry are dangerous; keep livestock, gates and all barriers undisturbed.
Timeline
- 1565 A dated lintel marked the entrance to the Udny tower house.
- 1639 Earl Marischal temporarily captured the defended residence.
- Late 17th century Windows, interiors and probably the stair tower were modernised.
- 1734 An accidental fire ended occupation and began the ruin phase.
What we know — and what remains uncertain
The exact date of the earliest fabric, later stair tower and current structural condition has not been established through a modern safety survey.
Sources & further reading
- Historic Environment Scotland: Knockhall Castle, SM5577 — Designation status, official mapped location, date, fabric and architectural or archaeological interest.
- Trove designation: SM5577 — Parallel national record identity and archival context.
- Aberdeenshire HER: Knockhall Castle — Local record identity, building history and archaeological context.
Location
OS grid reference NJ 99358 26458 · Location confidence: High: the current national designation supplies an exact mapped National Grid Reference; the public text separately states access and any current-use uncertainty. · Select the marker to open its satellite view in Google Maps. On desktop, drag Pegman (the yellow figure) onto a blue road. On mobile, turn on the Street View layer and tap a blue road. Other photo markers may be user-contributed.
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