BRE Methodology
3D computer model of St. Helier
Placement of receptors at window locations
BRE analysis - daylight availability
BRE Amended criteria Mirror Un-amended Character of Design Standard Mirror criteria St Helier Principles Mirror +height
Daylight Character of St. Helier
Sunlight/Daylight character of St. Helier Patriotic Place Figure 3 from Sunlight and Daylight Availability Assessment - Revised 24 June
Sunlight/Daylight character of St. Helier Kensington Place Figure 5 from Sunlight and Daylight Availability Assessment - Revised 24 June
Sunlight/Daylight character of St. Helier Patriotic Street Figure 7 from Sunlight and Daylight Availability Assessment - Revised 24 June
Daylight Assessment
70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline
70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline
70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline
70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline
70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline
70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline
Mirror Analysis
Alternative Criteria - Mirror
Alternative Criteria - Mirror Mirror of Kensington Place Mirror of Newgate Street
Alternative Criteria - Mirror Parameter Massing against the existing Parameter Massing against the ‘mirror’ 70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline
Alternative Criteria - Mirror Parameter Massing against the existing 70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline Parameter Massing against the ‘mirror’
Mirror+ Height Analysis
Alternative Criteria – Mirror & Equivalency Mirror Mirror +1m Mirror +2m Mirror +3m Mirror +4m Mirror +5m Mirror +6m Mirror +7m
Alternative Criteria – Mirror & Equivalency Mirror Mirror +1m Mirror +2m Mirror +3m Mirror +4m Mirror +5m Mirror +6m Mirror +7m
Design Principles
Design Principles • Mitigation 1: 1 receptor improved in VSC • Mitigation 2: 3 receptors improved in VSC • Mitigation 3: 3 receptors improved in VSC No PASH or PWSH analysis as receptors do not face within 90° of due south. Illustrative scheme elevation – Newgate Street
Design Principles • Mitigation 4: 0 receptor improved in VSC • Mitigation 5: 14 receptors improved in VSC • Mitigation 6: 14 receptors improved in VSC • Mitigation 7: 1 receptors improved in VSC Illustrative scheme elevation – Kensington Place
Design Principles • Mitigation 4: 0 receptor improved in PASH • Mitigation 4: 1 receptor improved in PWSH • Mitigation 5: 5 receptors improved in PASH Mitigation 4: 1 receptor improved in PWSH • Mitigation 6: 12 receptors improved in PASH Mitigation 4: 9 receptor improved in PWSH • Mitigation 7: 5 receptors improved in PASH Mitigation 4: 1 receptor improved in PWSH Illustrative scheme elevation – Kensington Place
Design Principles • Mitigation 8: 21 receptor improved in VSC Mitigation 8: 0 receptor improved in PASH Mitigation 8: 5 receptor improved in PWSH Illustrative scheme elevation – Gloucester Street
Qualitative Outcomes
Qualitative Outcomes Illustrative view of Landscape Link Illustrative view from Kensington Place – looking north-east
Summary of Findings
Affected properties on Kensington Place Target VSC > 27 Target VSC > 15 Target VSC > 10 70% – 80% of baseline Single property – correct floorplans available 60% - 70% of baseline Single property – reasonable assumption of floor plans 50% - 60% of baseline Single property – correct floorplan unavailable < 50% of baseline
Affected properties on Kensington Place Design principles, target VSC > 27 Design principles, target VSC > 15 Design principles, target VSC > 10 70% – 80% of baseline Single property – correct floorplans available 60% - 70% of baseline Single property – reasonable assumption of floor plans 50% - 60% of baseline Single property – correct floorplan unavailable < 50% of baseline
Affected properties on Newgate Street and Patriotic Street Newgate Street – Target VSC > 27 Patriotic Street – Target VSC > 27 Newgate Street – Target VSC > 15 Patriotic Street – Target VSC > 15 Patriotic Street – Target VSC > 10 Newgate Street – Target VSC > 10 Newgate Street Patriotic Street 70% – 80% of baseline Single property – correct floorplans available Properties with 60% - 70% of baseline Single property – reasonable assumption of floor plans receptors on two 50% - 60% of baseline Single property – correct floorplan unavailable facades < 50% of baseline
Affected properties on Newgate Street and Patriotic Street Design principles, target VSC > 27 Design principles, target VSC > 27 Design principles, target VSC > 15 Design principles, target VSC > 15 Design principles, target VSC > 10 Design principles, target VSC > 10 Newgate Street Patriotic Street 70% – 80% of baseline Single property – correct floorplans available Properties with 60% - 70% of baseline Single property – reasonable assumption of floor plans receptors on two 50% - 60% of baseline Single property – correct floorplan unavailable facades < 50% of baseline
Summary Daylight Compliance VSC > 27% Meet criteria: Parameter Mass 1201 receptors = 84% Design Principles 1224 receptors = 86% Do not meet criteria: Parameter Mass 229 receptors = 16% Design Principles 206 receptors = 14%
Summary Daylight Compliance Adjusted criteria VSC > 15% VSC > 10% Meet criteria: Meet criteria: Parameter Mass 1333 receptors = 93% Parameter Mass 1417 receptors = 99% Design Principles 1355 receptors = 95% Design Principles 1422 receptors = 99.4% Do not meet criteria: Do not meet criteria: Parameter Mass 97 receptors = 7% Parameter Mass 13 receptors = 1% Design Principles 75 receptors = 5% Design Principles 8 receptors = 0.6%
Summary Table of affected properties – not part of presentation Original, unamended Amended assessment of Amended assessment of Parameter Volume Original, unamended Amended assessment of Amended assessment of assessment of Parameter Parameter Volume Parameter Volume assessment using a mirror assessment on the combined design principles c ombined design principles Volume: considering the local considering the local baseline: combined design principles : considering the local considering the local Target VSC>27 or 80% of context character of St. context character of St. Setting new target VSC > 27 Target VSC>27 or 80% of context character of St. context character of St. Building Address baseline Helier of VSC>15: Helier of VSC>10: or 80% of mirror. baseline Helier of VSC>15: Helier of VSC>10: (No. of properties) Target VSC>15 or 80% of Target VSC>10 or 80% of (No. of properties) (No. of properties) Target VSC>15 or 80% of Target VSC>10 or 80% of baseline baseline baseline baseline (No. of properties) (No. of properties) (No. of properties) (No. of properties) 1-34 Kensington Court 12 4 9 10 4 21 Kensington Place 2 2 2 23 Kensington Place 1 1 1 25 Kensington Place 1 2 27 Kensington Place 1 1 1 1 1 29 Kensington Place 2 1 2 2 1 31 Kensington Place 1 1 1 1 1 33 Kensington Place 3 2 3 3 1 35 Kensington Place 3 2 3 3 1 37 Kensington Place 3 2 3 3 2 40 Kensington Place - central 16 7 16 14 6 apartments 49-51 Kensington_Place 8 4 2 8 8 2 53 Kensington place 2 2 55 Kensington place 2 57 Kensington place 2 59 Kensington place 2 Newgate Street - central 3 storey 4 2 4 4 2 1 residential building 20 10 3 9 17 7 1 Newgate Street - Metro (two properties (two properties (two properties (one property (two properties (two properties are non- (this is a non-domestic Apartments are non-domestic) are non-domestic) are non-domestic) is non-domestic) are non-domestic) domestic) property) Patriotic Street - Metro 5 2 5 4 2 Apartments Patriotic Street 1 1 1 1 1 Total number of affected 85 39 5 78 74 31 2 properties Note: The number of affected properties are based on internal subdivision and best reasonable assumptions from information available. These assumptions are shown on the “Affected Properties on …” pages (pages 36-39) within this document.
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