3089 01 - karradakarrada.com/.../2014/11/13.02.25-design-and-access-statement-pen… · design and...

DESIGN AND ACCESS STATEMENTFEBRUARY 2013

3089- 120 ASKEW ROAD, W12 9BL

Prepared by:Stiff + Trevillion Architects16 Woodfield RoadLondonW9 2BET: 020 8960 5550F: 020 8969 8668

E: [email protected]

FW

FW

CR

FW

CF

4.6m

EDANSCOURT

El Sub Sta

9

2 to 4

12

1 7

8

12 13 15

15

14 1614

1

FW

CW

Ward Bdy

CF

CWFW

CW

FW

CW

Und

BASSEIN PARK ROAD

ASKEW ROAD

LAURENCE MEWS

127

126

130

7

108

2b

8

Surge

ry

3

1

116

132

13

145

128

House

18

16

Askew Road Church

2a

(PH)

12

The Sun

9

2

1

118

6

135

117

PLANNING

No. Date Revision Notes

GENERAL NOTES:

Do not scale from this drawing.

Check drawing on receipt and immediatelyreport any discrepancies to the Architect.

Verify all dimensions and levelson site prior to construction.

The contents of this drawing areStiff + Trevillion Architects LLP copyrightand shall not be re-used without their written permission.

GENERAL NOTES:





Stiff + Trevillion Architects LLP16 Woodfield RoadLondon W9 2BE

T +44(0)20 8960 5550F +44(0)20 8969 [email protected]

Project

W12Drawing LOCATION PLAN

3089Project No Drawing No Revision

Scale Date RevisedFEB/2013 00/00/0000

-@

120 ASKEW ROAD

011:1250 @ A4

FW

FW

CR

FW

CF

4.6m

EDANSCOURT

El Sub Sta

9

2 to 4

12

1 7

8

12 13 15

15

14 16

14

1

FW

CW

Ward Bdy

CF

CWFW

CW

FW

CW

Und

BASSEIN PARK ROAD

ASKEW ROAD

LAURENCE MEWS

127

126

130

7

108

2b

8

Surge

ry

3

1

116

132

13

145

128

House

18

16

Askew Road Church

2a

(PH)

12

The Sun

9

2

111

8

6

135

117

PLANNING

No. Date Revision Notes

GENERAL NOTES:





GENERAL NOTES:





Stiff + Trevillion Architects LLP16 Woodfield RoadLondon W9 2BE

T +44(0)20 8960 5550F +44(0)20 8969 [email protected]

Project



Scale Date RevisedFEB/2013 00/00/0000

-@

120 ASKEW ROAD

011:1250 @ A4

Febuary 2013

DESIGN AND ACCESS STATEMENTPAGE 2


CONTENTS

LOCATION

- Site

HISTORY - Askew Road

EXISTING DRAWINGS

PROPOSED DRAWINGS

DESIGN AND ACCESS STATEMENT

- Proposal- Layout- Appearance- Access - Lifetime homes- Sustainability

INTRODUCTION

This report has been prepared by Stiff + Trevillion Architects to propose a new third floor penthouse unit to No. 120 Askew Road. It is to be read with planning permission ref: 2011/02630/FUL which is currently under construction.RED LINE MARKS THE SITE BOUNDARY

Febuary 2013



LOCATION

SITE

The site is located on Askew Road.

The original The Sun Public House is adjacent by ground floor commercial units with residential units above.

The site is within walking distance from Goldhawk Road, Shepherd’s bush and Ravenscourt Park tube stations. The No. 266 bus travels down Askew road traveling between Acton and Hammersmith.

The site area is approximately 493m2.

PLANNINGProject



Scale Date RevisedAUG/2011 00/00/0000@

TRANSPORT LINKS

120 ASKEW ROAD (THE SUN)No. Date Revision NotesGENERAL NOTES:




The contents of this drawing areStiff + Trevillion Architects LLP copyrightand shall not be re-used without their written permission. 03

Stiff + Trevillion Architects Ltd16 Woodfield RoadLondon W9 2BE

T +44(0)20 8960 5550F +44(0)20 8969 [email protected] 1:10000 @ A2

LEGENDDISTRICT LINE TUBE STATIONPICADILLY LINE TUBE STATIONHAMMERSMITH & CITY LINE TUBE STATIONCENTRAL LINE TUBE STATION266 BUS ROUTE

120 ASKEW ROAD

RED LINE SHOWS ASKEW ROAD

CHISWICKPARK

TURNHAMGREEN

GUNNERSBURY

ACTONTOWN

STAMFORDBROOK RAVENSCOURT

PARKHAMMERSMITH

BARONSCOURT

WESTKENSINGTON

HOLLANDPARK

SHEPHERDSBUSH

GOLDHAWKROAD

WHITECITY

WOODLANE

SHEPHERDSBUSH MARKET

MAP SHOWING VARIOUS TRANSPORT LINKS AND TUBE LINES

PLANNINGProject



Scale Date RevisedAUG/2011 00/00/0000@

TRANSPORT LINKS

120 ASKEW ROAD (THE SUN)No. Date Revision NotesGENERAL NOTES:




The contents of this drawing areStiff + Trevillion Architects LLP copyrightand shall not be re-used without their written permission. 03

Stiff + Trevillion Architects Ltd16 Woodfield RoadLondon W9 2BE

T +44(0)20 8960 5550F +44(0)20 8969 [email protected] 1:10000 @ A2

LEGENDDISTRICT LINE TUBE STATIONPICADILLY LINE TUBE STATIONHAMMERSMITH & CITY LINE TUBE STATIONCENTRAL LINE TUBE STATION266 BUS ROUTE

120 ASKEW ROAD

RED LINE SHOWS ASKEW ROAD

CHISWICKPARK

TURNHAMGREEN

GUNNERSBURY

ACTONTOWN

STAMFORDBROOK RAVENSCOURT

PARKHAMMERSMITH

BARONSCOURT

WESTKENSINGTON

HOLLANDPARK

SHEPHERDSBUSH

GOLDHAWKROAD

WHITECITY

WOODLANE

SHEPHERDSBUSH MARKET

DESIGN AND ACCESS STATEMENTPAGE4


HISTORYASKEW ROAD

The black and white images to the right show early views of Askew road taken from the position of No. 118/120 Askew Road looking South. The images to the right show the current view of Askew Road from the same position.

The Sun Inn pub was rebuilt in 1960 after it was bombed during WW2 on the 25th September, 1940 killing 21 people .

PHOTOGRAPHS BELOW SHOWING VIEWS LOOKING SOUTH ALONG ASKEW ROAD FROM No.118

Febuary 2013



EXISTING

Planning permission ref: 2011/02630/FUL has been granted for 8No. residential units + a new ground floor retail unit currently under construction.

1

No. 120 ASKEW ROAD No. 118 No. 116No. 124No. 126No. 128

BASSEIN PARKROAD

+111.025 ROOF HEIGHT

+106.870 SECOND FLOOR

+103.300 EXTENSION ROOF HEIGHT

+103.670 FIRST FLOOR

+100.000 GROUND

THE SUN INN- No. 120 ASKEW ROAD No. 118 No. 116

+ 103.000 FIRST FLOOR

+ 106.640 ROOF

+ 100.000 GROUND FLOOR

No. 124No. 126No. 128

BASSEIN PARKROAD

THE SUN

+ 108.270 TOP OF ROOF

20 10m4 6 8APPROVED FRONT ELEVATION ALONG ASKEW ROAD

PHOTOGRAPH LEFT SHOWING No. 120 ASKEW ROAD AS EXISITNG

Febuary 2013



PROPOSED

The approved building currently under con-struction has a ground floor retail unit with a single one storey extension to the rear and 8No. Residential units above. The proposal is to add a 9th penthouse unit at third floor with a new 70º mansard roof set back from the parapet.

PROPOSED FRONT ELEVATION ALONG ASKEW ROAD

THE SUN INN- No. 120 ASKEW ROAD No. 118 No. 116

+ 103.000 FIRST FLOOR

+ 106.640 ROOF

+ 100.000 GROUND FLOOR

No. 124No. 126No. 128

BASSEIN PARKROAD

THE SUN

+ 108.270 TOP OF ROOF

20 10m4 6 8

No. 120 ASKEW ROAD No. 118 No. 116No. 124No. 126No. 128

BASSEIN PARKROAD

5

DGE-01 DGE-05

W1-05 W1-04 W1-03 W1-02 W1-01

W2-04 W2-03 W2-02 W2-01W2-05

NEW ADDITIONAL UNIT

+111.025 PARAPET HEIGHT

+109.570 PENTHOUSE FLOOR

+106.870 SECOND FLOOR

+103.300 EXTENSION ROOF HEIGHT

+103.535 FIRST FLOOR

+100.000 GROUND

+112.250 PROPOSED ROOF HEIGHT

Febuary 2013

DESIGN AND ACCESS STATEMENTPROPOSAL

The proposal is to construct the following:

- A new 3 bedroom penthouse unit, 203sqm.- Additional refuse + bike storage has been added to the ground floor area.

LAYOUT

The proposed building will have a retail unit on the ground floor and 9No. residential units above. This layout is similar to the previous layout and adjacent properties along Askew Road. There will be a refuse store provided for each residiential unit and a separate store for the retail unit. The bin store provides adaquete storage for both waste and recyclables for each dwelling.

SCALE

The proposed new penthouse is set back from the parapet and will have a 70º mansard roof.

APPEARANCE

The front facade will respond to the existing structure. The sides of the façade will remain as brick and the centre of the front facade will remain as render. The retail signage will remain in the same position as the previous signage. There will be a new glazed shop front fitted but will span the same distance as the existing.

ACCESS

The new penthouse mansard roof will be clad in black anthrazinc standing seam with matching brickwork gable ends.

LIFETIME HOMES

The new penthouse has been designed to comply with the London Plan ‘Lifetime Homes Standard’.

SUSTAINABILITY

The site will be designed and constructed to reduce energy demand and carbon dioxide emissions. The objective is to reduce the energy demand to an economic minimum by making investment in the parts of the building that have the greatest impact on energy demand and are the most difficult and costly to change in the future, namely the building fabric. Once a cost effective structure has been designed, renewable technologies will be considered for installation to provide heat and/or electricity.

The following hierarchy will be followed:- Lean reduce demand and consumption- Clean increase energy efficiency- Green provide low carbon renewable energy sources



Febuary 2013

The main design aspects selected to achieve compliance are summarised below.- External constructions’ thermal U-values achieve the limiting values specified within Part L;- Construction achieves an air permeability of 5m3/m2h at 50Pa;- Glazing with a thermal U-value of 2.2 W/m2k, a g-value of 0.65 and a total shading coefficient of 0.74 specified throughout.- Utilise a variable refrigerant flow (VRF) system to provide the space heating and cooling within the retail areas with minimum seasonal efficiencies of 1.86 and 1.9 respectively;- Efficient lighting installed throughout

Lean Measures:

Realising the improvement opportunities highlighted in the baseline assessment the leanmeasures chosen to be implemented include:

- Introduction of solar control glazing throughout with a thermal U-value of 1.7 W/m2k, a g-value of 0.43 and a total shading coefficient of 0.49;- External wall thermal U-value specified as 0.2 W/m2k;- Roof thermal U-value specified as 0.15 W/m2k;- Heat recovery added to the ventilation system with a minimum heat transferefficiency of 75%,

Residential units:

Achieving Part L Compliance- Upgrades to the external fabric of the dwelling to achieve reduced heat losses and energy consumption;- Provision of high efficiency systems and services;- The inclusion of dedicated solar thermal panels to reduce energy required for domestic hot water,- The inclusion of dedicated photovoltaic panels to contribute to the electricalconsumption within each dwelling.- To prevent the unnecessary wastage of potable water and achieve level 4 it is required that all new dwellings are assessed using the Water Efficiency Calculator and that the calculated water consumption is less than or equal to 105 litres/person/day.

This will be achieved through the specification of: -Dual flush low volume cisterns; -Low flow taps and shower heads; -Low volume baths;- Water efficient white goods; and- Dedicated meters to monitor consumption.

Lean Measures:

Realising the opportunities for improvement described above the proposed lean measures include:

- Construction achieves an air permeability of 3m3/m2h at 50Pa;- External wall thermal U-value specified as 0.15 W/m2k;- A mechanical ventilation system complete with heat recovery and a specificfan power of 0.5 W/l/s;- 75% energy efficient lighting installed.- Switching the cooking fuel to electricity;- Assuming efficient appliances will be installed which will account for an energy saving of 15% (Equivalent to changing from a “C” rated appliance to a “B”rated appliance).



RENEWABLE TECHNOLOGIES

This section determines the appropriateness of each renewable technology and considers the ability of each technology to comply with the planning requirements.

The Government Renewable Obligation defines renewable energy in theUK. The identified technologies are;- Small hydro-electric- Landfill and sewage gas- Onshore and offshore wind- Biomass- Tidal and wave power- Geothermal power- Solar

Solar Water Heating:

Solar hot water panels use the suns energy to directly heat water circulating through panels or pipes. The technology is simple and easily understood by purchasers. Solar hot water heating panels are based generally around two types, which are available being ‘flat plate collectors’ and ‘evacuated tubes’. Flat plate collectors can achieve and output of up to 1,124 kWh/annum and evacuated tubes can achieve outputs up to 1,365 kWh/annum ** Panels are traditionally roof mounted and for highest efficiencies should be mounted plus or minus 30 degrees of due south. Evacuated tubes can be laid horizontally on flat roofs but flat plate collectors are recommended to be laid at an incline of 30 degrees

* Figures taken from Schuco (Schüco Solar Compact Line)** Figures taken from Riomay

The roof space is sufficient for installing solar water heating panels.

Photovoltaics:

Photovoltaic panels (PV) provide clean silent electricity. They generate electricity during most daylight conditions although they are most efficient when exposed to direct sunlight or are orientated to face plus or minus 30 degrees of due south. PV panels can be integrated into many different aspects of a development including roofs, walls, shading devices or architectural panels. The panels typically have an electrical warranty of 20-25 years and an expected system lifespan of 25-40 years. The expectation is that there will be a reduction in the capital costs in the near future but currently the capital cost per unit of energy output issignificantly higher than solar water heating panels and the efficiency of energy conversion lower.

The roof space is sufficient for installing photovoltaic panels.

Air Source Heat Pumps (ASHP):

Air sourced heat pumps operate using the same reverse refrigeration cycle as ground source heat pumps, however the initial heat energy is extracted from the external air rather than the ground. These heat pumps can be reversed to provide cooling to an area although this reduces the coefficient of performance of the pumps.

ASHPs could be used but care would need to be taken to ensure the location of the outside unit does not create a noise nuisance.

Solar Hot Water Panels



It is proposed to install a total of eight solar hot water panels on the flat roof of the block. These will be placed on racks and orientated to due south-east. It is proposed to install a single panel to Units 1-8. The solar collector is connected to the secondary coil on the hot water cylinder and water is circulated around this system using a pump. The power consumption of the pump has been taken into account in the figures quoted which are net figures. The hot water system is pressurised and a dual coil hot water cylinder used. It is assumed the panel will provide 50% of the annual hot water demand.

Therefore the contribution from the panels is calculated as follows;

The maximum output of the panel is 1,124 kWh p.a. therefore Plots 1-8 are capped at 1,124 kWh p.a.2,059 kWh p.a.

The total contribution from the panels is therefore: 8,740 kWh p.a

With associated CO2 savings of: 1,730 kg CO2 p.a.

Photovoltaic Panels (PVs)

It is proposed to install a total of 10 photovoltaic panels onto the flat roof of the block. These will be installed on racks orientated to the south-east. The array will consist of Schuco 170wp panels, each of which has an output of 142 kWh per annum. Each panel measures 1.66 m x 0.834 m



Plot number Hot water demand 50 % of Hot Water DemandkWh p.a. kWh p.a.

Unit 1 2339 1169Unit 2 2339 1169Unit 3 2339 1169Unit 4 2339 1169Unit 5 2339 1169Unit 6 2339 1169Unit 7 2339 1169Unit 8 2339 1169Unit 9 2339 1169

21051 10521

Renewable technologies Quantity Total kWh saving Total kg CO2 reductionkWh p.a. Kg p.a.

Schuco solar hot water panels 9 9232 1946Schuco photovoltaic panels 10 1420 751

10652 2697

Febuary 2013

PROPOSAL

In order to reduce the CO2 emissions by 20% it is proposed to install:

- 9 No. solar hot water heating panels (one panel for each residential unit)- 10 No. photovoltaic panels.- Air source heat pumps

-Upgrading the thermal performance of the building fabric will also contribute to a reduced infiltration gain and conduction losses. This should be coupled with the use of solar controlglazing to reduce excessive solar gains and help reduce the necessary cooling.-Reducing the energy consumed by the Retail unit’s lighting would also reduce the internal gains experienced and provide energy savings.



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