BRE Methodology 3D computer model of St. Helier Placement of - - PowerPoint PPT Presentation

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BRE Methodology 3D computer model of St. Helier Placement of - - PowerPoint PPT Presentation

May 01, 2023 103 likes •535 views

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

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BRE Methodology

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3D computer model of St. Helier

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Placement of receptors at window locations

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BRE analysis - daylight availability

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BRE Un-amended criteria Amended criteria Character of St Helier Mirror Standard Mirror Mirror +height Design Principles

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Daylight Character of

  • St. Helier
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Sunlight/Daylight character of St. Helier Patriotic Place

Figure 3 from Sunlight and Daylight Availability Assessment - Revised 24 June

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Sunlight/Daylight character of St. Helier Kensington Place

Figure 5 from Sunlight and Daylight Availability Assessment - Revised 24 June

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Sunlight/Daylight character of St. Helier Patriotic Street

Figure 7 from Sunlight and Daylight Availability Assessment - Revised 24 June

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Daylight Assessment

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70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline

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70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline

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70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline

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70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline

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70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline

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70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline

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Mirror Analysis

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Alternative Criteria - Mirror

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Alternative Criteria - Mirror

Mirror of Newgate Street Mirror of Kensington Place

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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

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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

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Mirror+ Height Analysis

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Alternative Criteria – Mirror & Equivalency

Mirror Mirror +1m Mirror +2m Mirror +3m Mirror +4m Mirror +5m Mirror +6m Mirror +7m

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Alternative Criteria – Mirror & Equivalency

Mirror Mirror +1m Mirror +2m Mirror +3m Mirror +4m Mirror +5m Mirror +6m Mirror +7m

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Design Principles

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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

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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

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Design Principles

Illustrative scheme elevation – Kensington Place

  • 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

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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

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Qualitative Outcomes

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Qualitative Outcomes

Illustrative view of Landscape Link Illustrative view from Kensington Place – looking north-east

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Summary of Findings

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Affected properties on Kensington Place

Target VSC > 27 Target VSC > 15 Target VSC > 10

Single property – correct floorplans available Single property – reasonable assumption of floor plans Single property – correct floorplan unavailable 70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline

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Affected properties on Kensington Place

Design principles, target VSC > 27 Design principles, target VSC > 15 Design principles, target VSC > 10

Single property – correct floorplans available Single property – reasonable assumption of floor plans Single property – correct floorplan unavailable 70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline

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Affected properties on Newgate Street and Patriotic Street

Newgate Street – Target VSC > 27 Patriotic Street – Target VSC > 27 Newgate Street – Target VSC > 15 Newgate Street – Target VSC > 10 Patriotic Street – Target VSC > 15 Patriotic Street – Target VSC > 10

Single property – correct floorplans available Single property – reasonable assumption of floor plans Single property – correct floorplan unavailable 70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline Properties with receptors on two facades

Newgate Street Patriotic Street

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Affected properties on Newgate Street and Patriotic Street

Single property – correct floorplans available Single property – reasonable assumption of floor plans Single property – correct floorplan unavailable 70% – 80% of baseline 60% - 70% of baseline 50% - 60% of baseline < 50% of baseline Properties with receptors on two facades

Design principles, target VSC > 27 Design principles, target VSC > 15 Design principles, target VSC > 10 Design principles, target VSC > 27 Design principles, target VSC > 15 Design principles, target VSC > 10 Newgate Street Patriotic Street

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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

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VSC > 10% VSC > 15%

Meet criteria: Parameter Mass 1333 receptors = 93% Design Principles 1355 receptors = 95% Do not meet criteria: Parameter Mass 97 receptors = 7% Design Principles 75 receptors = 5% Meet criteria: Parameter Mass 1417 receptors = 99% Design Principles 1422 receptors = 99.4% Do not meet criteria: Parameter Mass 13 receptors = 1% Design Principles 8 receptors = 0.6%

Summary Daylight Compliance Adjusted criteria

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Summary Table of affected properties – not part of presentation

Building Address

Original, unamended assessment of Parameter Volume: Target VSC>27 or 80% of baseline (No. of properties) Amended assessment of Parameter Volume considering the local context character of St. Helier of VSC>15: Target VSC>15 or 80% of baseline (No. of properties) Amended assessment of Parameter Volume considering the local context character of St. Helier of VSC>10: Target VSC>10 or 80% of baseline (No. of properties) Parameter Volume assessment using a mirror baseline: Setting new target VSC > 27

  • r 80% of mirror.

(No. of properties) Original, unamended assessment on the combined design principles: Target VSC>27 or 80% of baseline (No. of properties) Amended assessment of combined design principles considering the local context character of St. Helier of VSC>15: Target VSC>15 or 80% of baseline (No. of properties) Amended assessment of combined design principles considering the local context character of St. Helier of VSC>10: Target VSC>10 or 80% of baseline (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 apartments 16 7 16 14 6 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 residential building 4 2 4 4 2 1 Newgate Street - Metro Apartments 20 (two properties are non-domestic) 10 (two properties are non-domestic) 3 (two properties are non-domestic) 9 (one property is non-domestic) 17 (two properties are non-domestic) 7 (two properties are non- domestic) 1 (this is a non-domestic property) Patriotic Street - Metro Apartments 5 2 5 4 2 Patriotic Street 1 1 1 1 1 Total number of affected properties 85 39 5 78 74 31 2

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.