Development applications in St Marys, NSW 2760

61 development applications were lodged for properties in St Marys from Oct 2025 to Sep 2026. What is being built, how much of it is housing, and where each application stands.

Latest council activity: 16 Sept 2026

Applications lodged

incl. 14 modifications

Decided

26 still in progress

New dwellings proposed

stated on applications

Declared construction value

$99.5M

across 33 applications

Applications lodged each month

Oct 2025 to Sep 2026. The latest month is month-to-date, and councils can publish applications a few weeks after lodgement.

7
Oct
2
Nov
4
Dec
7
Jan
1
Feb
4
Mar
7
Apr
0
May
9
Jun
9
Jul
7
Aug
4
Sep

What is being proposed

47 new applications by main type of work (modifications excluded).

Commercial, industrial & community17
Subdivisions7
Pools, sheds, garages & decks6
New houses5
Alterations & additions4
Dual occupancy & semi-detached4
Apartments & townhouses3
Demolition only1

Where applications stand

Status of the 61 applications lodged in the last 12 months.

Approved: 1
Determined (outcome not stated): 21
Refused: 0
Withdrawn or not accepted: 13
In progress: 26

Many council records only say an application was "determined", without saying whether it was approved, so those are shown separately rather than counted as approvals.

Largest projects in the last 12 months

Ranked by dwellings proposed, then declared construction cost.

76 Mamre Road
Demolition, Multi-dwelling housing, Erection of a new structure
Determined
Apartments & townhouses · Lodged 12 Jan 2026 · 12 dwellings · $1M–$5M
150 Canberra Street
Multi-dwelling housing, Erection of a new structure
In progress
Apartments & townhouses · Lodged 2 June 2026 · 4 dwellings · $500K–$1M
5 Jacka Street
Dual occupancy, Demolition, Subdivision, Medium Density Housing, Erection of a new structure, Dual occupancy (attached), Residential…
In progress
Apartments & townhouses · Lodged 28 Oct 2025 · 2 dwellings · $500K–$1M
12 Edgar Street
Subdivision, Erection of a new structure, Dual occupancy (attached)
In progress
Dual occupancy & semi-detached · Lodged 1 July 2026 · 2 dwellings · $500K–$1M
55 Morris Street
Demolition, Erection of a new structure, Dual occupancy (attached)
In progress
Dual occupancy & semi-detached · Lodged 23 July 2026 · 2 dwellings · $500K–$1M

Most recent applications

The 30 most recent applications lodged in St Marys, newest first. Costs are shown as bands.

75B Dunheved Circuit Part Lot 7 In DP31908
Subdivision
In progress
Subdivisions · Lodged 16 Sept 2026 · $5M–$20M
128 Glossop Street
Subdivision
In progress
Subdivisions · Lodged 15 Sept 2026
206 Desborough Road
Demolition, Shed, Erection of a new structure
In progress
Pools, sheds, garages & decks · Lodged 15 Sept 2026 · Under $100K
87 Christie Street
Subdivision
Withdrawn
Subdivisions · Lodged 10 Sept 2026 · $5M–$20M
22-24 Christie Street
Waste storage facility, Resource recovery facility, Waste or resource transfer station, Hours of operation and trading, Waste or resource…
Withdrawn
Commercial, industrial & community · Lodged 28 Aug 2026 · Modification
382-396 Great Western Highway
Recreation facility (indoor), Hours of operation and trading
Withdrawn
Commercial, industrial & community · Lodged 26 Aug 2026 · Under $100K
25 Moira Crescent
Dwelling house, Erection of a new structure
In progress
New houses · Lodged 20 Aug 2026 · 1 dwelling · $100K–$500K
220 Shepherd Street
Dwelling house, Erection of a new structure, Residential Accommodation
In progress
New houses · Lodged 20 Aug 2026 · 1 dwelling · $500K–$1M
86 Sydney Street
Erection of a new structure, Centre-based child care
Determined
Commercial, industrial & community · Lodged 6 Aug 2026 · $1M–$5M · Modification
9-15 Kommer Place
Erection of a new structure, Awnings, blinds and canopies
In progress
Pools, sheds, garages & decks · Lodged 5 Aug 2026 · $500K–$1M
Shop 2 192 Queen Street
Advertising and signage, Change of use of land or a building or the classification of a building under the Building Code of Australia…
In progress
Commercial, industrial & community · Lodged 3 Aug 2026
9-15 Kommer Place
Erection of a new structure, Awnings, blinds and canopies
In progress
Pools, sheds, garages & decks · Lodged 28 July 2026 · Modification
90-100 Lee Holm Road
Warehouse or distribution centre, Alterations or additions to an existing building or structure, Change of use of land or a building or the…
In progress
Commercial, industrial & community · Lodged 27 July 2026 · Under $100K
55 Morris Street
Demolition, Erection of a new structure, Dual occupancy (attached)
In progress
Dual occupancy & semi-detached · Lodged 23 July 2026 · 2 dwellings · $500K–$1M
9-15 Kommer Place
Erection of a new structure, Awnings, blinds and canopies
Withdrawn
Pools, sheds, garages & decks · Lodged 23 July 2026 · $500K–$1M
9-15 Kommer Place
Erection of a new structure, Awnings, blinds and canopies
Withdrawn
Pools, sheds, garages & decks · Lodged 23 July 2026 · Modification
9-15 Kommer Place
Erection of a new structure, Awnings, blinds and canopies
Withdrawn
Pools, sheds, garages & decks · Lodged 22 July 2026 · $500K–$1M
31-43 Power Street
Demolition, Industrial development, Warehouse or distribution centre, Advertising and signage, Erection of a new structure, General industry
In progress
Commercial, industrial & community · Lodged 16 July 2026 · $20M–$100M
6 Chapel Street
Demolition, Erection of a new structure, Group home, Group home (permanent), Non-standard Housing, Residential Accommodation
In progress
Demolition only · Lodged 3 July 2026 · $500K–$1M
12 Edgar Street
Subdivision, Erection of a new structure, Dual occupancy (attached)
In progress
Dual occupancy & semi-detached · Lodged 1 July 2026 · 2 dwellings · $500K–$1M
69-81 Lee Holm Road
Warehouse or distribution centre, Erection of a new structure
In progress
Commercial, industrial & community · Lodged 26 June 2026 · $20M–$100M
237 Shepherd Street
Demolition, Dwelling house, Erection of a new structure
Determined
New houses · Lodged 23 June 2026 · 1 dwelling · $100K–$500K
12 Edgar Street
Demolition, Subdivision, Erection of a new structure, Dual occupancy (attached)
Withdrawn
Dual occupancy & semi-detached · Lodged 21 June 2026 · 2 dwellings · $500K–$1M
69-81 Lee Holm Road
Subdivision, Erection of a new structure, Earthworks, retaining walls and structural support
In progress
Subdivisions · Lodged 18 June 2026 · $5M–$20M
102 Vincent Street
Subdivision
In progress
Subdivisions · Lodged 11 June 2026 · $100K–$500K
86 Queen Street
Change of use of land or a building or the classification of a building under the Building Code of Australia, Retail Premise, Food and…
In progress
Commercial, industrial & community · Lodged 11 June 2026 · Under $100K
16 Tidswell Street
Dwelling house, Alterations or additions to an existing building or structure
Determined
Alterations & additions · Lodged 10 June 2026 · Under $100K
18 Sydney Street
Multi-dwelling housing, Erection of a new structure
Withdrawn
Apartments & townhouses · Lodged 10 June 2026 · 6 dwellings · $1M–$5M · Modification
150 Canberra Street
Multi-dwelling housing, Erection of a new structure
In progress
Apartments & townhouses · Lodged 2 June 2026 · 4 dwellings · $500K–$1M
84 Links Road
Warehouse or distribution centre, Alterations or additions to an existing building or structure
Determined
Commercial, industrial & community · Lodged 24 Apr 2026 · $5M–$20M · Modification

Application details as published by Penrith City Council, Blacktown City Council. The council's own register is the authoritative record for any individual application.

Suburb profile

St Marys market data

Median prices, rental yield, growth, vacancy and properties for sale in St Marys.

Sales

Recently sold in St Marys

What buyers actually paid, days on market and recent sale prices in St Marys.

Development in St Marys: frequently asked questions

How many development applications were lodged in St Marys in the last 12 months?

61 development applications were lodged for properties in St Marys from Oct 2025 to Sep 2026. 14 were modifications to an earlier application. The busiest month was Jun 2026, with 9 applications.

What kind of development is happening in St Marys?

Of the new applications lodged in the last 12 months, the most common were commercial, industrial & community (17), subdivisions (7), pools, sheds, garages & decks (6).

How many new homes are proposed in St Marys?

Applications lodged in St Marys in the last 12 months propose 25 new dwellings, counting new houses, granny flats, dual occupancies, townhouses and apartments where the application states a dwelling count. Withdrawn applications and modifications are excluded.

How many development applications in St Marys have been decided?

Of the 61 applications lodged in the last 12 months, 22 have a decision (1 recorded as approved, 21 recorded as determined without the outcome stated), 26 are still in progress and 13 were withdrawn or not accepted.

Which council assesses development applications in St Marys?

Applications for St Marys are lodged with Penrith City Council and Blacktown City Council. Each council's public register is the authoritative record for any individual application.