September 2009 1 COLUMBUS TOWER
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COLUMBUS TOWER DEVELOPMENT, 2 HERTSMERE ROAD, LONDON, E14 4AB REVIEW OF DAYLIGHT, SUNLIGHT AND OVERSHADOWING EFFECTS Prepared on behalf of the Greater London Authority September 2009 1 Nathaniel Lichfield & Partners Ltd 14 Regent's Wharf All Saints Street London N1 9RL Offices also in T 020 7837 4477 Cardiff F 020 7837 2277 Manchester Newcastle upon Tyne [email protected] www.nlpplanning.com COLUMBUS TOWER DAYLIGHT AND SUNLIGHT REVIEW Executive Summary 1.1 This report reviews the Gordon Ingram Associates (GIA) Daylight and Sunlight Assessment and supplementary information submitted in support of the planning application for the Columbus Tower development at No. 2 Hertsmere Road, London E14 4AB (LBTH Ref. No. PA/08/02709). The review has been prepared on behalf of the Greater London Authority to assist the Mayor of London in determining the application. It considers the acceptability of the scope of the assessment, the accuracy of the daylight and sunlight modelling and results and the validity of the conclusions drawn. It also provides a commentary on the London Borough of Tower Hamlets determination of the application in terms of daylight and sunlight matters. 1.2 The review confirms that the scope of the assessment is appropriate in terms of the neighbouring properties and areas of amenity space assessed. The methodology and significance criteria employed in the assessment are also considered generally acceptable. 1.3 Comparison daylight and sunlight plots have been undertaken to verify the accuracy and precision of the data on which the assessment is based. The calculations corroborate the accuracy of GIA’s daylight and sunlight modelling and the validity of the assessment results. 1.4 GIA’s daylight and sunlight assessment concludes that, whilst the development will result in some breaches of the relevant Building Research Establishment (BRE) guidance, the daylight and sunlight effects will, on balance, be acceptable. In NLP’s professional opinion, these conclusions are reasonable. 1.5 The review provides a commentary on the London Borough of Tower Hamlets determination of the planning application in terms of daylight and sunlight impacts. The Council’s first committee report (from the 25 June 2009 committee meeting where the application was recommended for approval) concludes that, while the development will result in some losses of daylight and sunlight, the impacts are, on balance considered acceptable. We would broadly agree with these conclusions. The Council’s second committee report (04 August 2009) does not provide any evidence for justifying its change in stance in relation to the development’s daylight and sunlight effects. Having reviewed the daylight and sunlight assessment and the officer’s reports, there is no basis for the Council’s second reason for refusing the application on daylight and sunlight grounds. 1.6 In NLP’s professional opinion, taking account of the flexible nature of the BRE guidance, the character of the site and its surroundings and the benchmarks set by the previously approved development at the site and other existing and emerging developments in Canary Wharf, the daylight, sunlight and overshadowing effects arising as a result of the Columbus Tower development 12118/752088v1 COLUMBUS TOWER DAYLIGHT AND SUNLIGHT REVIEW would, on balance, be acceptable and it would be unreasonable to refuse planning permission on these grounds. 12118/752088v1752088_1.DOC COLUMBUS TOWER DAYLIGHT AND SUNLIGHT REVIEW Contents 4 Executive Summary 1.0 Introduction 1 2.0 Background 3 3.0 Scope of Daylight and Sunlight Assessment 5 Neighbouring Properties and Amenity Space Assessed 5 Assessment Methodology and Significant Criteria 6 Scope of Assessment: Summary 7 4.0 Analysis of Daylight and Sunlight Results 9 5.0 Data Interpretation and Conclusions 10 Daylight and Sunlight Assessment: Results and Conclusions 10 NLP Interpretation of the Daylight and Sunlight Assessment 11 6.0 Commentary on the Council’s Interpretation of the Daylight and Sunlight Assessment 14 London Borough of Tower Hamlets – Strategic Development Committee (25 June 2009) 14 London Borough of Tower Hamlets – Strategic Development Committee (04 August 2009) 15 Summary: LB Tower Hamlets Interpretation of Daylight and Sunlight Assessment 15 7.0 Summary and Conclusions 17 Scope of Assessment 17 Modelling and Data Accuracy 17 Data Interpretation and Assessment Conclusions 17 The Council’s Interpretation of the Daylight and Sunlight Assessment 18 Overall Conclusions 18 12118/752088v1752088_1.DOC COLUMBUS TOWER DAYLIGHT AND SUNLIGHT REVIEW Tables Table 5.1: Comparison between the daylight and sunlight impacts arising from the Columbus Tower development and other recently approved developments Appendices Appendix 1: Supplementary VSC results for additional residential properties surrounding the site Appendix 2: Results of comparison VSC plots for a sample of window reference points assessed 12118/752088v1752088_1.DOC COLUMBUS TOWER DAYLIGHT AND SUNLIGHT REVIEW 1.0 Introduction 1.1 This report provides a review of the daylight and sunlight assessment and supplementary information submitted in support of the planning application for the Columbus Tower development at No. 2 Hertsmere Road, London E14 4AB (LBTH Ref. No. PA/08/02709). It also considers the approach taken by the London Borough of Tower Hamlets to the assessment of these issues in its committee reports when addressing PA/08/02709. The review has been prepared on behalf of the Greater London Authority to assist the Mayor of London in determining the application. 1.2 Nathaniel Lichfield and Partners (NLP) is an independent town planning consultancy with a specialist daylight and sunlight team, which provides advice to local planning authorities, developers, architects and third parties regarding daylight and sunlight issues relating to the planning process. 1.3 The daylight and sunlight assessment submitted in support of the planning application was undertaken by Gordon Ingram Associates in December 2008 (Environmental Statement; Chapter 09). The ES Chapter also addressed the development’s effects in terms of light pollution and solar glare. This review addresses daylight, sunlight and overshadowing impacts only. 1.4 This review has been undertaken in the context of relevant planning policy and guidance, as well as the BRE daylight and sunlight guidance (B uilding Research Establishment ‘Site Layout Planning for Daylight and Sunlight: A Guide to Good Practice’; 1991 ). It has been based on the following documents and information sources: • Columbus Tower Environmental Statement: Chapter 09 - Daylight, Sunlight, Overshadowing, Light Pollution and Solar Glare (Gordon Ingram Associates; December 2008); • Columbus Tower Environmental Statement: Appendix 10.2 – Detailed Results of the Daylight and Sunlight Analysis (Gordon Ingram Associates; December 2008); • Summary reporting letter dated 16 July ’09 providing a synopsis of the Daylight and Sunlight Assessment (Gordon Ingram Associates; 16.07.09); • Columbus Tower Environmental Statement: - Regulation 19 Response (URS); • Columbus Tower Consultation ‘Sweep Up’ (GVA Grimley 09.04.09); • Columbus Tower Consultation ‘Sweep Up’ – Appendix D (URS; April 2009); • Three Dimensional AutoCAD Daylight and Sunlight Model (Gordon Ingram Associates; December 2008); • Planning application drawings for the Columbus Tower development (Mark Weintraub Architecture and Design; December 2008); • Planning application drawings for approved neighbouring developments (10 Garford Street; Mary Jones House; Matthew House and Riverside House). P1/22 12118/752088v1 COLUMBUS TOWER DAYLIGHT AND SUNLIGHT REVIEW 1.5 The review is structured as follows: • Section 2.0 provides an overview of the background to this review of the daylight and sunlight assessment; • Section 3.0 provides a comprehensive review of the scope of the submitted GIA daylight and sunlight assessment to ensure all neighbouring residential properties requiring assessment have been considered. It also provides a critique of the methodology and significance criteria used in the daylight, sunlight and overshadowing analyses. • Section 4.0 considers the validity of the daylight, sunlight and overshadowing modelling and calculations on which the daylight and sunlight assessment is based. A sample of comparison daylight and sunlight plots/calculations have been undertaken to confirm the data’s accuracy. • Section 5.0 provides a review of the data interpretation and conclusions drawn in the daylight and sunlight assessment. • Section 6.0 provides a commentary on Tower Hamlets interpretation of the daylight and sunlight assessment in its determination of the application. • Section 7.0 provides a summary of this review and our conclusions are drawn. P2/22 12118/752088v1 COLUMBUS TOWER DAYLIGHT AND SUNLIGHT REVIEW 2.0 Background 2.1 The application site, No. 2 Hertsmere Road, is situated on Hertsmere Road at the Western end of West India Dock North in the Canary Wharf area of Tower Hamlets. It covers an area of 0.356 hectares and is currently occupied by Hertsmere House, a four storey office building constructed in the late 1980s. The areas to the east, south and south west of the site are commercial in use, while the areas to the north and west include residential accommodation, which requires consideration in terms of potential daylight and sunlight effects. 2.2 A planning application was submitted by the current applicant, Commercial Estates Group, in June 2003 for the construction of a 63 storey commercial