Development applications in Thirlmere, NSW 2572
147 development applications were lodged for properties in Thirlmere from Oct 2025 to Sep 2026. What is being built, how much of it is housing, and where each application stands.
Latest council activity:
Applications lodged
147
incl. 18 modifications
Decided
111
21 still in progress
New dwellings proposed
103
stated on applications
Declared construction value
$62.5M
across 116 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.
- 11Oct
- 7Nov
- 4Dec
- 9Jan
- 9Feb
- 14Mar
- 19Apr
- 14May
- 18Jun
- 17Jul
- 14Aug
- 11Sep
What is being proposed
129 new applications by main type of work (modifications excluded).
- New houses86
- Pools, sheds, garages & decks22
- Alterations & additions8
- Commercial, industrial & community3
- Demolition only2
- Dual occupancy & semi-detached2
- Granny flats2
- Other & change of use2
- Subdivisions2
Where applications stand
Status of the 147 applications lodged in the last 12 months.
- Approved
- 0
- Determined (outcome not stated)
- 111
- Refused
- 0
- Withdrawn or not accepted
- 15
- In progress
- 21
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.
- Determined
40 Michell Road
Dwelling house, Erection of a new structure, Residential Accommodation
New houses · Lodged 7 July 2026 · 2 dwellings · $1M–$5M
- Determined
130 Estonian Road
Erection of a new structure, Dual occupancy (attached)
Dual occupancy & semi-detached · Lodged 23 Oct 2025 · 2 dwellings · $500K–$1M
- Determined
12 Morris Crescent
Secondary dwelling, Dwelling house, Erection of a new structure
New houses · Lodged 17 Apr 2026 · 2 dwellings · $500K–$1M
- Determined
6 Brasenia Place
Secondary dwelling, Dwelling house, Erection of a new structure
New houses · Lodged 13 Mar 2026 · 2 dwellings · $500K–$1M
- Determined
35 Marion Street
Secondary dwelling, Dwelling house, Erection of a new structure
New houses · Lodged 23 Apr 2026 · 2 dwellings · $500K–$1M
Most recent applications
The 30 most recent applications lodged in Thirlmere, newest first. Costs are shown as bands.
- In progress
40 Morris Crescent
Erection of a new structure, Swimming pool
Pools, sheds, garages & decks · Lodged 19 Sept 2026 · Under $100K
- In progress
335 Bridge Street
Shed, Erection of a new structure
Pools, sheds, garages & decks · Lodged 19 Sept 2026 · Under $100K
- In progress
30 Morris Crescent
Dwelling house, Erection of a new structure
New houses · Lodged 17 Sept 2026 · 1 dwelling · $500K–$1M
- In progress
21 Marion Street
Dwelling house, Erection of a new structure
New houses · Lodged 17 Sept 2026 · 1 dwelling · $500K–$1M
- Determined
14 Morris Crescent
Dwelling house, Erection of a new structure
New houses · Lodged 16 Sept 2026 · 1 dwelling · $1M–$5M · Modification
- In progress
23 Marion Street
Dwelling house, Erection of a new structure
New houses · Lodged 16 Sept 2026 · 1 dwelling · $500K–$1M
- In progress
7 Marion Street
Dwelling house, Erection of a new structure
New houses · Lodged 8 Sept 2026 · 1 dwelling · $500K–$1M
- In progress
20 Innes Street
Shed, Dwelling house, Erection of a new structure, Tennis courts, Swimming pool
New houses · Lodged 8 Sept 2026 · 1 dwelling · $1M–$5M · Modification
- In progress
35 Shelleys Lane
Subdivision
Subdivisions · Lodged 3 Sept 2026 · $100K–$500K
- In progress
27 Oaks Street
Erection of a new structure, Centre-based child care, Recreation facility (indoor)
Commercial, industrial & community · Lodged 2 Sept 2026 · $5M–$20M · Modification
- Determined
28 Morris Crescent
Dwelling house, Erection of a new structure
New houses · Lodged 1 Sept 2026 · 1 dwelling · $100K–$500K · Modification
- Determined
13 Brundah Road
Dwelling house, Erection of a new structure, Residential Accommodation
New houses · Lodged 31 Aug 2026 · 1 dwelling · $100K–$500K
- In progress
22 Oaks Street
Demolition, Erection of a new structure, Community facility
Commercial, industrial & community · Lodged 27 Aug 2026 · $5M–$20M
- In progress
25 Glenanne Place
Subdivision
Subdivisions · Lodged 27 Aug 2026 · $500K–$1M · Modification
- Determined
5 Charlotte Place
Dwelling house, Erection of a new structure
New houses · Lodged 21 Aug 2026 · 1 dwelling · $500K–$1M
- Determined
42 Morris Crescent
Dwelling house, Erection of a new structure
New houses · Lodged 20 Aug 2026 · 1 dwelling · $500K–$1M
- Determined
25 Morris Crescent
Dwelling house, Erection of a new structure
New houses · Lodged 18 Aug 2026 · 1 dwelling · $500K–$1M
- Determined
187 Thirlmere Way
Shed, Erection of a new structure
Pools, sheds, garages & decks · Lodged 14 Aug 2026 · Under $100K
- Determined
4 Charlotte Place
Shed, Erection of a new structure
Pools, sheds, garages & decks · Lodged 13 Aug 2026 · Under $100K · Modification
- Determined
36 Morris Crescent
Dwelling house, Erection of a new structure
New houses · Lodged 12 Aug 2026 · 1 dwelling · $500K–$1M
- Determined
267 Thirlmere Way
Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 10 Aug 2026 · Under $100K
- Determined
16 Greene Place
Dwelling house, Erection of a new structure
New houses · Lodged 10 Aug 2026 · 1 dwelling · $500K–$1M
- Determined
19 Morris Crescent
Shed, Dwelling house, Erection of a new structure, Driveways and hard stand spaces
New houses · Lodged 7 Aug 2026 · 1 dwelling · $500K–$1M
- Determined
25 North Street
Dwelling house, Erection of a new structure
New houses · Lodged 6 Aug 2026 · 1 dwelling · $100K–$500K
- Determined
187 Thirlmere Way
Dwelling house, Erection of a new structure, Residential Accommodation
New houses · Lodged 5 Aug 2026 · 1 dwelling · $500K–$1M
- Withdrawn
54 Carlton Road
Multi-dwelling housing, Subdivision, Medium Density Housing, Erection of a new structure
Apartments & townhouses · Lodged 29 July 2026 · 6 dwellings · $1M–$5M · Modification
- Determined
51 Morris Crescent
Secondary dwelling, Dwelling house, Erection of a new structure
New houses · Lodged 28 July 2026 · 2 dwellings · $100K–$500K
- In progress
335A Bridge Street
Dwelling house, Erection of a new structure
New houses · Lodged 27 July 2026 · 2 dwellings · $500K–$1M
- Determined
36 Chalker Street
Secondary dwelling, Dwelling house, Erection of a new structure, Earthworks, retaining walls and structural support
New houses · Lodged 23 July 2026 · 2 dwellings · $500K–$1M
- Determined
34 Morris Crescent
Dwelling house, Erection of a new structure
New houses · Lodged 22 July 2026 · 1 dwelling · $500K–$1M
Application details as published by Wollondilly Shire Council. The council's own register is the authoritative record for any individual application.
Suburb profile
Thirlmere market data
Median prices, rental yield, growth, vacancy and properties for sale in Thirlmere.
Sales
Recently sold in Thirlmere
What buyers actually paid, days on market and recent sale prices in Thirlmere.
Development in Thirlmere: frequently asked questions
How many development applications were lodged in Thirlmere in the last 12 months?
147 development applications were lodged for properties in Thirlmere from Oct 2025 to Sep 2026. 18 were modifications to an earlier application. The busiest month was Apr 2026, with 19 applications.
What kind of development is happening in Thirlmere?
Of the new applications lodged in the last 12 months, the most common were new houses (86), pools, sheds, garages & decks (22), alterations & additions (8).
How many new homes are proposed in Thirlmere?
Applications lodged in Thirlmere in the last 12 months propose 103 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 Thirlmere have been decided?
Of the 147 applications lodged in the last 12 months, 111 have a decision (111 recorded as determined without the outcome stated), 21 are still in progress and 15 were withdrawn or not accepted.
Which council assesses development applications in Thirlmere?
Applications for Thirlmere are lodged with Wollondilly Shire Council. Its public register is the authoritative record for any individual application.