Philbeach Conservation area architects SW5

Window replacement and external alterations to a ground floor flat

Project description | Kensington and Chelsea SW5 Philbeach conservation area alterations to a ground floor flat

Replacement and enlargement of a number of windows and associated internal alterations aim to improve the quality of the habitable rooms and of the residential provisions. 


This design and access statement was prepared in support to making a full planning application for carrying out alterations to the Ground floor flat, 49 Philbeach Gardens, SW5 9EB, London.

The existing flat occupies the ground floor of a four storey residential building at SW5 Philbeach Conservation area. We proposed the replacement of the front windows and one rear window with matching frames and details. We also proposed to enlarge the opening that leads to the rear garden and replace the existing door and windows with new aluminium framed doors and windows to improve access to natural light. For the same reason we proposed to enlarge the side window of this room and replace it with similar aluminium frames.

Associated internal alterations aimed to improve the quality of the habitable rooms and of the residential provisions.

We believe that the proposed changes will compliment the character of the existing building, do not impact on the amenities of the adjacent properties and create an improved living space that blends contemporary design with the character of the host building.
We do not propose to alter the access around the front or the rear of the flat.


The property is within the Philbeach Conservation Area and the key architectural detailing and materials used in area are listed below.

We propose to replace some of the existing window timber frames with matching double glazed timber frames and details, and at the rear to improve access to light by replacing some timber frames with aluminium double glazed frames that add a contemporary and complimentary character to the existing property:
• Brick (Italianate houses have pale gaults to front and flanks fronting streets; and yellow stocks to rear elevations) and Domestic Revival houses are stock brick and red brick for dressings. Church: red brick)
• Stucco (architectural ornamentation and dressings)
• Stone (dressings to St Cuthbert’s, steps, paving slabs, coping stones to walls)
• Lime (mortar and stucco)
• Slate and lead (roofs)
• Painted timber (windows and doors)
• Painted cast iron (railings, balconies, pot guards, boot scrapers, bollards)
• Terracotta (chimney pots)
• Glass (thin crown or cylinder glass)
• Quarry/mosaic tiles (covering to steps)


The proposals would preserve the character and appearance of the building, street scene and conservation area. This is because they are minor in scale. The double glazed traditional timber sashes will be sympathetic –reflecting those present at the property and whole terrace. The enlarged side window and introduction of sliding rear patio door would discreetly be located where private and public views are limited. The proposal would therefore accord with the objectives of Policies CL1, CL2, CL3, CL6 and CL11 of the Consolidated Local Plan 2015.

In terms of impact on the living conditions, it was clear from the site visit that there is some degree of mutual overlooking into the rear garden of basement flat from the existing rear bedroom window and side window of the host property. Notwithstanding this, Policy CL5 requires reasonable visual privacy for the occupants of existing properties affected by the development and, that where this is already substandard, that, there should be no material worsening of the condition.

The proposal includes the enlargement of an existing side window which overlooks into the garden of the basement flat. This enlarged window will be obscured glazed and fixed shut. A condition will be added on the permission to secure this. Subject to compliance with this condition, it is considered that, the development would not result in a material worsening of existing conditions in terms of increase in the degree of overlooking and loss of privacy and would therefore accord with Policy CL5 on those grounds.

Considerable importance and weight has been attached to and special attention has been paid to the desirability of preserving or enhancing the character or appearance of the conservation area, under s.72 of the Planning (Listed Buildings and Conservation Areas) Act 1990, as amended.
Weight was also given to relevant local Supplementary Planning Guidance/Documents and Statements, including: Philbeach Conservation Area

Recommendation: Grant Planning Permission

Project type | Window replacement and external alterations to a ground floor flat

Client | Private

Location | Philbeach Conservation area, SW5 Kensington and Chelsea

Architecture and planning | GOAStudio London residential architecture limited

Currently | Completed, Summer 2022

Architectural services we provided for this Philbeach conservation area project

Initial home consultation, measured survey and production of existing set of drawings, planning stage design and submission, obtaining local authority approvals, and liaising with other consultants and the main contractor to completion.

Click to read our Kensington and Chelsea Conservation architect and planning guide that includes detailed planning and design advice for your home project. For inspiration and ideas see below some of our other residential projects in Kensington and Chelsea.

Kensington and Chelsea conservation architects W14 Holland Park Conservation area by GOAStudio London architects 09 Rear elevation as existing scaled Philbeach Conservation area architects


See our guides for ideas, inspiration and architectural advice for your home project.

We have prepared a guide on the type of Architectural plans you will need for your home project, and another guide for Terraced house extension plans that includes advice on detached and semi-detached properties as well.


Your local Council will have in place design and planning requirements for your home project and you will need to obtain planning approval for a wide range of extensions and alterations to your property.

When you get in touch we will offer you detailed advice about what is likely that your Council will approve and in the meantime we have prepared the following architectural and planning guides that include extracts of the relevant planning policy and examples of our projects in our Borough.

Barnet residential architect and planning guide, Camden residential architect and planning guide, Enfield residential architect and planning guide, Hackney residential architect and planning guide, Hammersmith Fulham residential architect and planning guide, Haringey residential architect and planning guide, Hounslow residential architect and planning guide, Islington residential architect and planning guide, Kensington and Chelsea Conservation architects, residential and planning guide,  Lambeth residential architect and planning guide, Lewisham residential architect and planning guide, Newham residential architect and planning guide, Redbridge residential architect and planning guide, Richmond residential architect and planning guide, Tower Hamlets residential architect and planning guide, Waltham Forest residential architect and planning guide, Wandsworth residential architect and planning guide, Westminster residential architect and planning guide

We provide architectural services in the following London Boroughs:

Read our design, planning, and architectural guides above if you seek advice for your project.

We can help you with these home extensions and renovations:

See our guides above for ideas, inspiration and architectural advice for your home project.

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We specialise in

  • Greener homes
  • Retrofit and energy efficiency for older and traditional buildings
  • Conservation areas
  • Listed Buildings
  • Homeowner architectural services
  • Developer architectural services

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GOAStudio London residential architecture limited, 86-90 Paul Street, EC2A 4NE, Hackney

GOAStudio London residential architecture limited, Chestnut Avenue South, E17 9EJ, Waltham Forest

t: 0203 984 3005


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