Development applications in Seaforth, NSW 2092
63 development applications were lodged for properties in Seaforth 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
63
incl. 19 modifications
Decided
44
15 still in progress
New dwellings proposed
8
stated on applications
Declared construction value
$35.8M
across 39 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.
- 7Oct
- 6Nov
- 13Dec
- 3Jan
- 5Feb
- 8Mar
- 3Apr
- 3May
- 2Jun
- 3Jul
- 8Aug
- 2Sep
What is being proposed
44 new applications by main type of work (modifications excluded).
- Alterations & additions25
- New houses10
- Commercial, industrial & community3
- Pools, sheds, garages & decks3
- Dual occupancy & semi-detached2
- Other & change of use1
Where applications stand
Status of the 63 applications lodged in the last 12 months.
- Approved
- 1
- Determined (outcome not stated)
- 43
- Refused
- 0
- Withdrawn or not accepted
- 4
- In progress
- 15
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.
- In progress
18 Seaforth Crescent
Alterations or additions to an existing building or structure, Dual occupancy (attached)
Dual occupancy & semi-detached · Lodged 30 Apr 2026 · 2 dwellings · $100K–$500K
- Determined
34 Castle Circuit
Dwelling house, Erection of a new structure
New houses · Lodged 8 Nov 2025 · 1 dwelling · $1M–$5M
- Determined
9 Gurney Crescent
Demolition, Dwelling house, Erection of a new structure, Swimming pool
New houses · Lodged 1 Mar 2026 · 1 dwelling · $1M–$5M
- In progress
91 Seaforth Crescent
Demolition, Dwelling house, Erection of a new structure
New houses · Lodged 5 Mar 2026 · 1 dwelling · $1M–$5M
- In progress
7 Clavering Road
Dwelling house, Erection of a new structure, Earthworks, retaining walls and structural support, Swimming pool
New houses · Lodged 9 July 2026 · 1 dwelling · $1M–$5M
Most recent applications
The 30 most recent applications lodged in Seaforth, newest first. Costs are shown as bands.
- In progress
5 Aden Street
Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 17 Sept 2026 · $500K–$1M
- In progress
115 Seaforth Crescent
Alterations or additions to an existing building or structure, Stairway
Alterations & additions · Lodged 9 Sept 2026 · $100K–$500K
- In progress
18 Bligh Crescent
Dual occupancy, Subdivision, Dual occupancy (detached)
Dual occupancy & semi-detached · Lodged 31 Aug 2026 · Under $100K
- In progress
1 Sandra Place
Erection of a new structure, Emergency work and repairs
Other & change of use · Lodged 31 Aug 2026 · $100K–$500K
- In progress
10 Bligh Crescent
Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 24 Aug 2026 · $100K–$500K · Modification
- In progress
19 David Place
Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 18 Aug 2026 · $500K–$1M
- In progress
60A Kirkwood Street
Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 18 Aug 2026 · $100K–$500K
- In progress
79 Seaforth Crescent
Dwelling house, Erection of a new structure
New houses · Lodged 14 Aug 2026 · $100K–$500K
- In progress
161B Seaforth Crescent
Dwelling house, Subdivision, Erection of a new structure
New houses · Lodged 14 Aug 2026 · Modification
- Determined
21 Peacock Street
Demolition, Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 13 Aug 2026 · $100K–$500K · Modification
- In progress
5 Princes Promenade
Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 10 July 2026 · $1M–$5M
- In progress
7 Clavering Road
Dwelling house, Erection of a new structure, Earthworks, retaining walls and structural support, Swimming pool
New houses · Lodged 9 July 2026 · 1 dwelling · $1M–$5M
- In progress
91 Peacock Street
Demolition, Dwelling house, Erection of a new structure
New houses · Lodged 4 July 2026 · 1 dwelling · $1M–$5M
- Determined
40 Peacock Street
Demolition, Erection of a new structure, Balcony, deck, patio, terrace or verandah, Earthworks, retaining walls and structural support…
Pools, sheds, garages & decks · Lodged 16 June 2026 · $100K–$500K
- Determined
41C Castle Circuit
Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 15 June 2026 · $500K–$1M
- Determined
49 Gurney Crescent
Dwelling house, Alterations or additions to an existing building or structure, Residential Accommodation
Alterations & additions · Lodged 9 May 2026 · $100K–$500K · Modification
- Determined
1 Jenner Street
Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 8 May 2026 · Under $100K
- Withdrawn
26 Magarra Place
Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 5 May 2026 · $500K–$1M
- In progress
18 Seaforth Crescent
Alterations or additions to an existing building or structure, Dual occupancy (attached)
Dual occupancy & semi-detached · Lodged 30 Apr 2026 · 2 dwellings · $100K–$500K
- Determined
41 Ellery Parade
Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 28 Apr 2026 · $100K–$500K · Modification
- Determined
32 Castle Circuit
Demolition, Dwelling house, Erection of a new structure, Swimming pool
New houses · Lodged 13 Apr 2026 · 1 dwelling · $1M–$5M · Modification
- Determined
8 Bligh Crescent
Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 30 Mar 2026 · $1M–$5M · Modification
- Determined
11 Seaforth Crescent
Erection of a new structure, Waterway structures - minor alterations, Jetty, Mooring Pen
Commercial, industrial & community · Lodged 27 Mar 2026 · Under $100K
- Determined
4 Salisbury Square
Demolition, Dwelling house, Erection of a new structure
New houses · Lodged 25 Mar 2026 · 1 dwelling · $1M–$5M · Modification
- Determined
149A Seaforth Crescent
Dwelling house, Erection of a new structure, Residential Accommodation
New houses · Lodged 12 Mar 2026 · 1 dwelling · $1M–$5M · Modification
- In progress
91 Seaforth Crescent
Demolition, Dwelling house, Erection of a new structure
New houses · Lodged 5 Mar 2026 · 1 dwelling · $1M–$5M
- Withdrawn
11 Seaforth Crescent
Erection of a new structure, Waterway structures - minor alterations, Jetty, Mooring Pen
Commercial, industrial & community · Lodged 3 Mar 2026 · Under $100K
- Determined
19 Harvey Street
Dwelling house, Alterations or additions to an existing building or structure
Alterations & additions · Lodged 2 Mar 2026 · Modification
- Determined
9 Gurney Crescent
Demolition, Dwelling house, Erection of a new structure, Swimming pool
New houses · Lodged 1 Mar 2026 · 1 dwelling · $1M–$5M
- Withdrawn
91 Seaforth Crescent
Demolition, Dwelling house, Erection of a new structure
New houses · Lodged 27 Feb 2026 · 1 dwelling · $1M–$5M
Application details as published by Northern Beaches Council. The council's own register is the authoritative record for any individual application.
Suburb profile
Seaforth market data
Median prices, rental yield, growth, vacancy and properties for sale in Seaforth.
Sales
Recently sold in Seaforth
What buyers actually paid, days on market and recent sale prices in Seaforth.
Development in Seaforth: frequently asked questions
How many development applications were lodged in Seaforth in the last 12 months?
63 development applications were lodged for properties in Seaforth from Oct 2025 to Sep 2026. 19 were modifications to an earlier application. The busiest month was Dec 2025, with 13 applications.
What kind of development is happening in Seaforth?
Of the new applications lodged in the last 12 months, the most common were alterations & additions (25), new houses (10), commercial, industrial & community (3).
How many new homes are proposed in Seaforth?
Applications lodged in Seaforth in the last 12 months propose 8 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 Seaforth have been decided?
Of the 63 applications lodged in the last 12 months, 44 have a decision (1 recorded as approved, 43 recorded as determined without the outcome stated), 15 are still in progress and 4 were withdrawn or not accepted.
Which council assesses development applications in Seaforth?
Applications for Seaforth are lodged with Northern Beaches Council. Its public register is the authoritative record for any individual application.