Technical Booklet D Structure·Page 83·Diagram 4C.15
Maximum height of annexes and single storey buildings
Diagram specifying maximum permitted heights for annexes and single storey buildings, varying by roof type and structure configuration. Heights range from 3.0 m to 4.5 m depending on whether the building has a flat or pitched roof and roof slope.
buildings
a) annexes
flat roof buildings pitched roof buildings
3.0 m maximum
3.6 m maximum
3.0 m maximum
maximum roof slope 40°
3.0 m maximum
3.0 m maximum
3.5 m maximum
4.5 m maximum
4.5 m maximum
3.5 m maximum
maximum roof slope 40°
maximum roof slope 40°
b) annexes (type 1) and (type 2)
flat roof annexes pitched roof annexes (type 1) pitched roof annexes (type 2)
Note: Height should be measured from the top of the foundation or from the underside of the floor slab where this provides effective lateral restraint. See para 4C.40(g).
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