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[F1SCHEDULE 3SDESCRIPTIONS OF BUILDING AND WORK, INCLUDING THE PROVISION OF SERVICES, FITTINGS AND EQUIPMENT, NOT REQUIRING A WARRANT

A. On condition that types 1–23 in all respects and/or in the manner of their fitting meet any standards required by the RegulationsS

1.  Any work to or in a house. Except–Any work which increases the floor area of the house. Any demolition or alteration of the roof, external walls or elements of structure. Any work involving underpinning. Any work adversely affecting a separating wall. Any work involving a change in the method of wastewater discharge. Work, not being work of types 3 to 26 below, to a house having a storey, or creating a storey, at a height of more than 4.5 metres.]