06 July 2015 Delivered electronically Royal Borough of Kensington and Chelsea, Planning Services, Town Hall, Hornton Street, W8 7NX Dear Joanna, LISTED BUILDING CONSENT APPLICATION - YOUR REF: LB/02374 9 WILBRAHAM PLACE, LONDON, SW1X 9AE We are acting on behalf of the freehold owners of 9 Wilbraham Place and, following the earlier submission of a listed building consent application, reference LB/15/02374 for works at roof level, I am pleased to provide, in respect of no. 9 Wilbraham Place, a new application for determination, which includes the following supplementary documentation: • Location plan, (ref: MAA100) to a scale 1:1250, with the site outlined in red • Site plan, (ref: MAA100a) to a scale 1:500 showing the site outlined in red • Roof plan (ref. MAA_101B) showing proposed areas of works • Roof plan (ref MAA_108) showing the proposed anti-skid walkway at roof level • Rosewood Method Statements (ref. RMS-01) • Photograph showing the existing lead dome on the Wilbraham Place elevation of the building • Sika Specification, works to flat roof (ref. SSP) • WCJ Engineering Report, detailing works to the chimney (ref. WCJ-R1A) • Supporting photographs showing the condition of the asphalt roof, as existing (to follow) • Supporting photographs showing the condition of the chimney stacks, as existing (to follow) The Charlotte Building 17 Gresse Street London W1T 1QL T 020 7851 4010 turley.co.uk Registered in England Turley Associates Limited no. 2235387. Registered office: 1 New York Street, Manchester, M1 4HD Proposals This application relates to: Works at roof level to include; Removal of defective lead from dome on Wilbraham Place elevation and replacement on a like-forlike basis Repair to damaged areas of mastic asphalt on main flat roof and apply coating of Sika Removal of defective cement render to chimney stacks and repair on a like-for-like basis. There will be no alterations to the interior of the building as part of this application. Significance of the Building No. 9 Wilbraham Place is a grade II listed building located within the Sloane Square Conservation Area. The property was listed on 31st August 1999 and the listed description reads: Mansion flats. Circa 1896 in Queen Anne style, architect not known. Built of red brick with stuccoed dressings and C20 tiled roof with Westmorland slates and stone finial to corner turret. Each of the three buildings has a different elevational treatment but forms a unified composition. 9A is of 5 storeys basement and attics; 4 sash windows. Attic has three triple windows divided by pilasters. Bracket cornice. Fifth floor has 3 triple windows and single window. Other floors have three curved bows through all floors with brick aprons (moulded to ground floor) and attached cast iron railings. Other window has mainly French windows and cast iron balconettes. Doorcase with double open fanlight and steps to street. No 9 is also of 5 storeys and attics with 4 windows to Wilbraham Place, including square tower to left and circular turret to right. Left side tower has curved lead roof. Attic storey has rusticated pilasters. Above the fifth floor is a segmental pediment with brackets. Triple window below with decorated terracotta panels and balustrading. Entrance has 4 Tuscan columns on piers and wooden double doors. To the right is a further bay with single windows, mostly French windows with cast iron balconies. Corner tower has cast iron balconies on all floors. 9B is also of 5 storeys and attics and basements and 4 windows. To the extreme left is full-height chimney breast. Attic has 4 double stuccoed flat roofed dormers. Large bracket cornice. Third and fourth floors have triple windows under cambered arches. Through basement to second floors are triple canted bays with aprons and balustrading above. Attached area railings. Rear elevation is plainer with cambered sashes and central external staircase. INTERIOR: Panelled halls with tessellated floors. Well staircases with scrolled cast iron balusters and brass handrails and two 1920s Marriott Scott lifts with cast iron grilles and mahogany cars. Original five-panelled rosewood doors remain together with elaborate cornices and fireplaces with bolection mouldings, Gibbs surrounds and pilasters with plumed capitals, paterae and panels. The significance of the building derives from the successful application of the Queen Anne style through the architectural detailing of the Wilbraham Place elevation, which has been little altered in its appearance. The building is six storeys in height above basement, of red brick construction with stucco embellishments. At ground floor level of the Wilbraham Place elevation, are simple cast iron railings, the design of which is repeated on the balconies at first, second and third floor level. The half-round bays on the Wilbraham Place elevation, embellished with stucco banding and brick projecting collars add interest to the character of the street scene. Likewise, the variety of window designs, some of which are accented by stucco 2 surrounds, provides a visual contrast to the red brick façade. At fifth floor, the triple windows, divided by pilasters add vertical emphasis to the façade. On the corner of Wilbraham Place is a turreted tower, which carries the high quality design onto D’Oyley Street. On the whole, the D’Oyley Street elevation is of a more simple design and of lesser significance to the principal elevation of Wilbraham Place. The Ellis Street elevation, in contrast to Wilbraham Place and D’Oyley Street is of a simple design and free of detailing and embellishments. The windows are cambered timber sash windows, again of a more simple design than those of the other two elevations, illustrating the lower status of this elevation. Overall, the Ellis Street elevation does not contribute to the significance of the building. Impact of Proposed Development Upon Significance The proposed works have taken consideration of the statutory duty of the Planning (Listed Buildings and Conservation Areas) Act 1990, national policy set out in the National Planning Policy Framework (The Framework), and regional and local policy for the historic environment. Paragraph 132 of the Framework requires that when considering the impact of proposals on the significance of a designated heritage asset, great weight should be given to their conservation, and the more important the asset the greater the weight should be. Where a development proposal would cause harm to a designated heritage asset, this should be treated as either substantial harm under paragraph 133 or less than substantial harm under paragraph 134 as appropriate taking into account the relative significance of the element affected. Policy CL4 of the Council’s Conservation and Design Policy SPD, adopted 3rd December 2014, states that, “the Council will require development to protect the heritage significance of listed buildings…To deliver this the Council will require all development and any works for alterations or extensions related to listed buildings, scheduled ancient monuments and sites of archaeological interest, to preserve the heritage significance of the building, monument or site or their setting or any features of special architectural or historic interest; 1. Removal of defective lead from dome on Wilbraham Place elevation and replacement on a like-for-like basis The lead on the dome roof, seen from the Wilbraham Place elevation is currently in poor condition, with evidence of corrosion and rippling, as seen in the photograph below. If left, the lead will begin lifting or splitting and will allow water to penetrate into the sub structure. The lead will be replaced on a like for like basis with sheet lead, as detailed within the Rosewood Method Statement, page 3. This like for like replacement will preserve the special architectural significance of this feature of interest and would not alter the appearance of the leaded dome or of the building as a whole. 3 Photograph showing the lead dome on the Wilbraham Place elevation 2. Repair to damaged areas of mastic asphalt on main flat roof and apply coating of Sika The main roof consists of a flat concrete deck covered with mastic asphalt. Areas of cracking and 'slumping' of the asphalt has started to occur around the front edge abutting the top of the mansard slope on the Wilbraham and D'Oyley Street elevations. The asphalt has been patch repaired and painted in the past to extend its life, however, it has now reached a point where the deterioration will lead to water ingress beneath the surface of the asphalt. Photographs showing its current condition are provided with the application. This current proposal for repairs to the asphalt has been set out in the Method Statement provided by Rosewood (page 4). All localised blisters, cracks and other defects would be 'ironed out' using the hot poultice method, the repairs are intended to give an even surface ready of the application of cold poured Decothane in accordance with the manufacturers recommendations by a Sika specialist approved contractor. All perimeter lead flashings would be carefully turned back to allow access to the asphalt surface and dressed back into position on the completion of the works. The details of the Sika application are detailed within the Specification provided by Sika, submitted with this application. Attached to the Sika specification are typical sketch details for the various features such as perimeter upstands and pipes where they protrude through the roof surface. The repairs to the asphalt will preserve the heritage significance of the listed building by preventing any further damage to the building’s fabric. The repairs will not alter the appearance of the building therefore will not impact upon the architectural significance. The current roof covering is modern in fabric and these repairs will arrest any further deterioration that may result in damage to historic fabric below. 3. Removal of defective cement render to chimney stacks and repair on a like-for-like basis The 18 chimney stacks on the roof of 9 Wilbraham Place have been inspected by WCJ Surveyors (report attached) and they have provided a recommendation of repairs, which is detailed within the Method Statement, provided by Rosewood (page 5). The chimneys are currently in a poor state of repair, as demonstrated by the photographs submitted in support of this application. The proposed works to the chimneys are a remedial approach to the fabric, in an attempt to prolong their lifespan. Any more intrusive works would likely risk the integrity of the chimney stacks and would require the replacement of the chimney stacks sooner than would be desirable. The proposed works would preserve maximum amount of historic fabric therefore would be considered to enhance the architectural significance of the listed building. 4 Accordingly, the proposals will conform to national and local planning policies and will enhance the special interest of the listed building, which is primarily invested in the high quality architectural detailing of the Wilbraham Place elevation. I trust that this is satisfactory but should you wish to discuss this matter further, please do not hesitate to contact me. Yours faithfully Paul Crisp Associate Director paul.crisp@turley.co.uk 5