What are the design elements of the proposed boarding house which minimise acoustic privacy impacts from the use of the communal open spaces, communal living area, and private balconies?
- In relation to the design of the Proposed Development in the context of the objectives and controls quoted above from Part 3.5 the RDCP, the Applicant submits helpfully, that:
"35 The Court can be satisfied that the boarding house has been designed to minimise acoustic privacy impacts from the use of these areas. This is so because:
35.1 The communal open spaces, one at ground floor and the other on level 03 of building B, have been separated into distinct areas, distant from each other.
This separation has an intrinsic consequence of providing future residents choice of areas to use and by design distributes and lessens the likely number of persons using each area, compared to the situation if there was one larger communal open space.
35.2 The design of each communal open space has been directed to further mitigate the possibility of large congregations.
For the ground floor open space, the arrangement of landscape features, seating and BBQ facility breaks up the space such that it lends itself to smaller group use.
This is reinforced by the adjacent positioning of the communal living room on the ground floor, which provides an enclosed area that is designed to encourage social interaction - eating, sitting, watching TV. The layout and arrangement of fixed and sliding windows, and door to the communal open space minimises and mitigates acoustic impacts.
For the level 03 communal open space, the area is again broken up into smaller spaces by landscape and seating. This area has been selected because it benefits from superior solar access compared to the ground floor communal open space - and can be expected to be likely preferred for that characteristic. The location is also further removed from adjoining buildings. Additionally, acoustic screening is provided around its edges.
35.3 Private balconies are also nominated as elements of concern. There are small balconies, around 2sqm, provided for each room above ground level. By design, they are not large enough to accommodate a table and chairs. They are designed to provide some additional amenity and fresh air to residents and, occasional use - but not for smoking. The design limits the likely use of them (and therefore the potential for noise generation), whether they are attached to single or double boarding rooms.
35.4 Management measures are proposed to limit the uses of the communal areas - by time, area and capacity, so as to exclude early morning and night time use (with the ground floor communal open space closed before 8.00am and after 8.00pm, the rooftop communal open space closed before 7.30am and after 10.00pm, and the communal living room closed before 7.00am and after 10.00pm) and to limit the potential for unmanaged noise generation. See the proposed Plan of Management dated 20 July 2022 (POM), section 4.7.
35.5 An on-site manager will be contactable 24 hours a day, 7 days a week. This measure is another design element that, in addition to likely
self-enforcing behaviour, will minimise and mitigate noise generation (in conjunction with the House Rules)."
- I include an extract from the ground floor drawing A-1203 Issue D (Ex D) below as an illustration of the design of the Proposed Development.
Fig 2: Ground floor DWG A-1203 Issue D
- The Respondent submits in general terms that "[w]ith the acceptance by Mr Gross that the level of noise emanating from the proposed development exceeding Background + 5dB(A), it cannot be said that the proposed boarding house is designed to minimise and mitigate any impacts on the acoustic privacy of neighbouring buildings and on the amenity or future residents" (par 20 Respondent Written Submissions). The Respondent further submits that "[t]he proposal has not sufficiently considered and incorporated design elements or embraced management practices to sufficiently ameliorate amenity impacts relating to noise (Baker Kavanagh Architects v Waverley Council [2004] NSWLEC 542 at [39])" (par 21 Respondent Written Submissions).
- I now look at each of the areas relevant to the acoustic design concern being the communal open spaces, the communal living area and the private balconies. The Respondent does not expressly address the specific areas. I will look at each of these areas in the context of the objectives and the control provisions of the RDCP.
- Firstly, in relation to the use of communal open spaces, I note the Applicant's submission quoted above (Applicant Written submissions at par 35.1 and 35.2). I refer to Fig 1: DWG A-1203 Issue D and note that the Proposed Development has reduced the outdoor seating area and that the seating area has an orientation towards the centre of the open space rather than outwards towards the adjoining neighbours. This is a design feature that addresses acoustic impacts. The rooftop includes a second communal open space. The new rooftop space has been designed to minimise its potential impacts on neighbours including its deep planter edges that will prevent overlooking of adjacent properties by managing sightlines from the communal space and help to manage acoustic impacts (Letter from Urbanac dated 22 April 2022, Ex B). I find that the communal open spaces are designed to minimise acoustic privacy impacts from the use of these areas. I will return to consider the acoustic impact of the use of communal open space when I address the POM separately below.
- Secondly, in relation to the use of communal living area (common room) I refer to Fig 1: DWG A-1203 Issue D and note that the Proposed Development previously incorporated sliding doors which have been replaced with two windows and one swinging door. The evidence of experts is that the impacts from the use of the common room can be managed (JER par 36) and the experts agree that it is the use of the common outdoor areas which has the potential for the greatest acoustic impact (JER par 37). I find that the communal living area is designed to minimise acoustic privacy impacts from the use of these areas.
- Thirdly and lastly, I consider the use of private balconies. The Supplementary Acoustic Report prepared by Mr Gross dated 29 June 2022, annexed to the JER (Ex 3) provides as follows:
"All balconies face east or west so do not directly face the nearest neighbours to the north and south at 89 and 83 Anzac Avenue. There are large setbacks to the residential buildings to the west in Forster Street, where 15 rooms are located (reduced from 20)." (Supplementary Acoustic Report, p 5)
- The acoustic experts consider that "due to the relatively small size of the private open spaces (balconies) that there would be limited activities/people with respect to this particular beyond the use of the residents of each room." (JER at par 35, Ex 3). I find that the private balconies are designed to minimise acoustic privacy impacts from the use of these areas.
- In accordance with Control (d) of clause 3.2 in Part 3.5 of the RDCP, the Applicant relies on the following acoustic reports:
1. Acoustical Report prepared by Koikas Acoustics Pty Ltd dated 28 June 2021 and filed with the Class 1 Application on 21 October 2021 (Ex A);
2. Acoustic Statement prepared by RWDI Australia dated 22 April 2022 accompanying the amended plans in May 2022 (Ex B); and
3. Supplementary Acoustic Report prepared by Neil Gross dated 29 June 2022 attached to the JER (Supplementary Acoustic Report) (Ex 3).
- It is agreed between the acoustic experts that "as the application has been amended, the recommendations and conclusions of the Koikas Acoustics report does not apply to the amended application." (JER par 16). Notwithstanding, pursuant to the RDCP, the number of rooms provided in the proposed boarding house leads to the building being classified under the Building Code of Australia (BCA) and therefore Section 7 of the Koikas Acoustics Report filed with the Class 1 Application (Ex A) should apply to the amended application (JER par 18). Section 7 of the Koikas Acoustics report provides recommendations which are expected to satisfy the relevant provisions of the BCA sound insulation requirements between tenancies, being internal measures for future residents of the boarding house. This is not ultimately relevant to the issues in dispute between the matters and the matter for determination before the Court.
- Mr Gross is of the opinion that he considers "the design (given the other design requirements of the DCP) in conjunction with an appropriate Plan of Management and adoption of House Rules can minimise and mitigate any unacceptable acoustic impacts." (JER par 51). On the other hand, Mr Cooper's opinion is that without +5 dB(A), he cannot assess the acoustic impact and he did not provide an opinion. As I have found that the design elements of the proposed boarding house minimise acoustic privacy impacts from the use of the communal open spaces, communal living area, and private balconies, it is now appropriate to turn to the POM.