Determined This application has been determined. Contact Hornsby Shire Council if you want to understand or challenge the decision. Some decisions can be appealed to the NSW Land and Environment Court, and who can appeal depends on the type of development.

Lodged 14 Apr 2026 On exhibition 20 Apr 2026 Under assessment Determined 12 Aug 2026

Status DETERMINED

Overview

Address

19a Northumberland Avenue Mount Colah 2079

Portal application no.

PAN-628156

Council reference

DA/326/2026

Application type

Development Application

Development types

Secondary dwelling; Dwelling house; Erection of a new structure

Estimated cost

$1,234,665

New dwellings

2

Storeys

2

Determination authority

Council staff under delegated authority

Key dates

Lodged

14 April 2026

Exhibition starts

20 April 2026

Exhibition ends

4 May 2026

Determined

12 August 2026

Source: NSW Planning Portal (opens in a new tab). The tracker searches by address, not by application number. Quote its portal number PAN-628156 or council reference DA/326/2026 when you contact Hornsby Shire Council.