Stay informed
Tick “Email me campaign updates” on the form. Receive information about this proposal and ways to take part.
MUSTON–RAGLAN, MOSMAN
A LOCAL RESIDENT CAMPAIGN
8 STOREYS?
NOT HERE.
Stop the proposed Muston–Raglan mega-lot.
Around 110 dwellings across nine properties. Concurrent rezoning sought. We’re local residents opposing the proposed scale and building an informed community response.
PROPOSED DEVELOPMENT · EOI 374244Know the facts. Bring your local voice.
01 / THE PROPOSAL
A major change.
On local streets.
The proposal brings together properties on Muston and Raglan Streets on the Balmoral Slopes. Here is what the published records tell us.
- 8
- storeys proposed
- ~110
- dwellings proposed
- 9
- properties in the declared site
- Rezoning
- sought alongside the proposal
THE DECLARED SITE
Muston Street
15, 17, 19, 21, 23, 25 & 27
Raglan Street
145A & 147
Named proponent:
Mondo Developments Pty Ltd.
Published concept:
Eight storeys and approximately 110 dwellings, with concurrent rezoning.
Source: HDA briefing, 18 August 2026, item 16; Declaration Order No 10 (2026), clause 4(1)(c). These records do not establish a final design or a building height in metres.
OUR POSITION
A neighbourhood.
Not a super-site.
We oppose the proposed eight-storey scale and are seeking refusal or withdrawal of the Muston–Raglan proposal.
Our response starts with public documents, residents’ first-hand knowledge and specific questions that the applicant and assessment authorities need to answer. We want the proposal’s controls, alternatives and local impacts clearly explained and properly tested.
02 / LATEST POSITION
What has happened.
What comes next.
Updated 19 October 2026.
We date our checks and distinguish official records from campaign interpretation. An official application reference and public document package are still being sought.
Check the official PortalHDA briefing records the concept
Item 16 describes the proposed eight-storey, approximately 110-dwelling scheme and concurrent rezoning.
SSD declaration published
Order No 10 declares the development State significant. It was signed on 31 August. This is a declaration, not development consent.
No matching public application identified
The campaign checked all 44 Mosman results across five Portal pages. No matching Muston–Raglan application, issued SEARs, EIS or exhibition deadline was established. This does not prove no private request or preparation exists.
03 / JOIN THE LOCAL EFFORT
Your street.
Your knowledge.
Your voice.
You don’t need to be a planning expert to help.
Join for updates, share something you know first-hand, offer photographs or help with research and distribution.
Open the resident formNo sign-in required. Email is optional. Photos up to 10 MB each. The form opens in a new tab.
Share local knowledge
Describe what you have observed, where and when. A dated photograph, a walking route or a specific question can help.
Offer practical help
Tell us if you can help with research, relevant professional skills, organising or distributing material.
04 / DOCUMENTS & SOURCES
Read the records.
Check the claims.
Start with the original public documents. The HDA reference is EOI 374244; it is not an SSD application number.
Original Mosman Collective report
“Mega Lot Exclusive: Nine Balmoral slopes homes earmarked for 110 luxury apartments.”
HDA record of briefing
The published concept, proponent and concurrent-rezoning request.
Declaration Order No 10 (2026)
Clause 4(1)(c): the declared site and EOI reference.
NSW Major Projects — Mosman
Check application records, assessment documents and participation details.
Mosman Masterplan
A separate process. It is not the Muston–Raglan application or an approval of it.
Local copies of the briefing and declaration are preserved public-source documents. Check the official source for later versions.
05 / COMMON QUESTIONS
A few things worth knowing.
Has this development been approved?
The SSD declaration is confirmed. It is not development consent. The campaign’s 19 October review did not establish a matching public application, consent or exhibition deadline. Any later official record should be checked for changes.
Can I make a formal objection now?
We have not verified an open formal exhibition for this proposal. You can join the campaign and contribute local knowledge now. When participation arrangements are confirmed, formal submissions should use the correct application reference and official process. Contacting this campaign is not a formal objection.
Is this the same as the other Muston or Redan projects?
No. The developments at 58–64 Muston, 65 Muston, 40–48 Redan and 50–56 Redan are separate. Their designs, figures, application stages and deadlines must not be transferred to this proposal. Our declared addresses are listed above.
Can I help without sharing my photos publicly?
Yes. The resident form states that contributions are reviewed privately and that the campaign will ask before sharing them. You can also use the contact form to discuss how you want material handled.
06 / CONTACT US
Get in touch.
Have a question or something to share?
Send a message to the campaign using the form.
MUSTON–RAGLAN, MOSMAN