Nave masonry C12.
Nave north wall has blocked Cl3 doorway and one C16, 2-light window with depressed heads to lights.
C12 south door in porch has one order of colonettes, block capitals and arch with roll-moulding.
South chapel has blocked lancet windows on return walls, tiny blocked C12 window and a re-set C12 door with round head and continuous roll-moulding on west wall.
2-light C14 windows with cusped Y- tracery to south and east.
Chancel, probably C13, has one small lancet on south wall.
Interior: low-pitched C16 nave roof with tie beams on large corbels and King posts.
Canopied, enriched arcades hold 14 figures of saints
angels with shields between.
In centre of each side 2 larger angels support heraldic shields.
Reredos behind with angel holding shield between demi-angels with helmets.
Above a C17 addition with strapwork and a Royalist motto:- De bon vouloir servir le Roy Also in south chapel, C18 fireplace with Gothick detail.
Small octagonal font dated 1670.
NU0625 : Chillingham, St. Peter's Church: The font, 1670, brought from Ancroft 3
Jacobean pulpit.