How big a granny flat can be on a house block in Central Coast Council's area — the LEP's cl 5.4(9) size rule (the greater of 60 m² or a share of the house), the state fast-track that gets one approved by a certifier in weeks, and what stops it. Read from the LEP text; the address check applies it to your lot.
The size rule under the LEP
60 m²floor area floor
30%of the house, if larger
450 m² · 12 mstate CDC fast-track
Central Coast LEP cl 5.4(9) — the greater of 60 m² or 30% of the house’s total floor area, parking excluded. In the C4 Environmental Living zone a secondary dwelling is permitted.
The fast-track
Under the Housing SEPP a secondary dwelling is permitted wherever a house is. The complying-development route needs a lot of 450 m² and 12 m wide, a flat of up to 60 m², single storey on most lots, 3 m rear and side setbacks and a 1 m path from the street — issued by a private certifier without a DA. Smaller lots, larger flats up to the LEP percentage, and constrained land go by DA to Central Coast Council. The flat stays on the house's title — it cannot be subdivided or strata-titled; that is what separates it from a duplex.
What stops it here
Trees — a protected tree in the backyard can stop the fast-track; Central Coast Council's tree controls apply before the footprint is drawn.
Bushfire — on mapped land the flat needs a BAL assessment and construction to match; it can still be approved but costs more.
Sewer — the main often runs across the back of the lot; building over or near it needs the water authority's approval.
Floor area — 60 m² is internal floor space; a verandah does not count, a carport can under some readings. Confirm before designing to the limit.
Enter the address — lot, width, zone and constraints, in about ten seconds.
Suburbs — Alison, Avoca Beach, Bar Point, Bateau Bay, Bensville, Berkeley Vale, Blackwall, Blue Bay, Blue Haven, Booker Bay, Bouddi, Box Head, Budgewoi, Budgewoi Peninsula, Buff Point, Bushells Ridge, Calga, Canton Beach, Cedar Brush Creek, Central Mangrove, Chain Valley Bay, Charmhaven, Cheero Point, Chittaway Bay, Chittaway Point, Cogra Bay, Colongra, Copacabana, Crangan Bay, Daleys Point, Davistown, Dooralong, Doyalson, Doyalson North, Durren Durren, East Gosford, Empire Bay, Erina, Erina Heights, Ettalong Beach, Forresters Beach, Fountaindale, Frazer Park, Freemans, Glenning Valley, Glenworth Valley, Gorokan, Gosford, Green Point, Greengrove, Gunderman, Gwandalan, Halekulani, Halloran, Hamlyn Terrace, Hardys Bay, Holgate, Horsfield Bay, Jilliby, Kangy Angy, Kanwal, Kariong, Kiar, Killarney Vale, Killcare, Killcare Heights, Kincumber, Kincumber South, Kingfisher Shores, Koolewong, Kulnura, Lake Haven, Lake Munmorah, Lemon Tree, Lisarow, Little Jilliby, Little Wobby, Long Jetty, Lower Mangrove, Macmasters Beach, Magenta, Mangrove Creek, Mangrove Mountain, Mannering Park, Mardi, Marlow, Matcham, Mooney Mooney, Mooney Mooney Creek, Mount Elliot, Mount White, Narara, Niagara Park, Norah Head, Noraville, North Avoca, North Gosford, Ourimbah, Palm Grove, Palmdale, Patonga, Pearl Beach, Peats Ridge, Phegans Bay, Picketts Valley, Point Clare, Point Frederick, Pretty Beach, Ravensdale, Rocky Point, San Remo, Saratoga, Shelly Beach, Somersby, Spencer, Springfield, St Huberts Island, Summerland Point, Tacoma, Tacoma South, Tascott, Terrigal, The Entrance, The Entrance North, Toowoon Bay, Toukley, Tuggerah, Tuggerawong, Tumbi Umbi, Umina Beach, Upper Mangrove, Wadalba, Wagstaffe, Wallarah, Wamberal, Warnervale, Watanobbi, Wendoree Park, West Gosford, Wondabyne, Woongarrah, Woy Woy, Woy Woy Bay, Wybung, Wyoming, Wyong, Wyong Creek, Wyongah, Yarramalong, Yattalunga.Who does granny flats here: designer · builder · certifier.
