Appeal Against Conditions
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Extensions
Residential Amenity
Character & Appearance
Inspector’s Reasoning
Appeal Decision
Site visit made on 13 February 2020
by A M Nilsson BA (Hons) DipTP MRTPI
an Inspector appointed by the Secretary of State
Decision date: 11 March 2020
Appeal Ref: APP/R5510/D/19/3241440
9 Ashbury Drive, Ickenham UB10 8BN
• The appeal is made under section 78 of the Town and Country Planning Act 1990
against a refusal to grant planning permission under section 73A of the Town and
Country Planning Act 1990 for the development of land carried out without complying
with conditions subject to which a previous planning permission was granted.
• The appeal is made by Hugh Richard Saunders & Laura Elizabeth Bowler against the
decision of the Council of the London Borough of Hillingdon.
• The application Ref 74454/APP/2019/2531, dated 30 July 2019, was refused by notice
dated 24 September 2019.
• The application sought planning permission for a single storey rear extension, single
storey side extension, single storey front extension, and conversion of garage to
habitable use without complying with a condition attached to planning permission Ref
74454/APP/2019/114, dated 12 March 2019.
• The condition in dispute is No. 2 which states that: The development hereby permitted
shall not be carried out except in complete accordance with the details shown on the
submitted plans, numbers 115 Rev. P2 and 116 Rev. P2.
• The reason given for the condition is: To ensure the development complies with the
provisions of the Hillingdon Local Plan: Part Two Saved UDP Policies (November 2012)
and the London Plan (March 2016).
Decision
1. The appeal is allowed and planning permission is granted for a single storey
rear extension, single storey side extension, single storey front extension, and
conversion of garage to habitable use at 9 Ashbury Drive, Ickenham UB10 8BN
in accordance with the application Ref 74454/APP/2019/2531 made on the 30
July 2019 without complying with condition No. 2 set out in planning
permission No 74454/APP/2019/114 granted on 12 March 2019 by the Council
of the London Borough of Hillingdon, but otherwise subject to the following
conditions:
1) The development hereby permitted shall begin not later than 3 years from
the date of the original decision, that being 12 March 2019.
2) The development hereby permitted shall not be carried out except in
complete accordance with the details shown on the submitted plans,
numbers 145 Rev. P1 and 146 Rev. P1.
3) The materials to be used in the construction of the external surfaces of the
development hereby permitted shall match those used in the existing
building and shall thereafter be retained as such.
Appeal Decision APP/R5510/D/19/3241440
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4) Notwithstanding the provisions of the Town and Country Planning (General
Permitted Development) Order 2015 (as amended) (or any order revoking
and re-enacting that Order with or without modification), no additional
windows, doors or other openings shall be constructed in the walls or roof
slopes of the development hereby approved facing No. 7 Ashbury Drive and
Nos. 12 - 14 Eleanor Grove.
5) Access to the flat roof over the extension hereby approved shall be for
maintenance or emergency purposes only and the flat roof shall not be used
as a roof garden, terrace, balcony, patio or similar amenity area.
Procedural Matter and Background
2. The application subject to this appeal is for a minor material amendment1. It
seeks approval of revised but not substantially different designs to an
extension approved in March 2019. This type of application is possible as a
condition was imposed on the original permission specifying the approved
plans. The appeal seeks removal of the condition and replacement with a
condition specifying the plans that reflect the amended designs.
3. The development that has taken place has breached condition 2 which requires
that the development shall not be carried out except in complete accordance
with the details shown on the submitted plans, numbers 115 Rev. P2 and 116
Rev. P2.
4. The appellant seeks to vary the approved plans to require that the
development shall not be carried out except in complete accordance with the
details shown on the submitted plans, numbers 145 Rev. P1 and 146 Rev. P1.
5. I observed on my site visit that the development that had taken place was not
the same as shown on plan numbers 145 Rev. P1 and 146 Rev. P1. I have
considered the appeal on the basis of the submitted plans.
6. The Council have commented that the Local Plan Part 2 Saved UDP Policies
(2012) against which the planning permission was initially determined has now
been withdrawn, the Council rely only on Policies DMHB 11 and DMHD 1 of the
Local Plan: Part Two - Development Management Policies (2020).
Main Issue
7. The main issue is the effect that varying the condition would have on the
character and appearance of the area.
Reasons
8. The appeal site comprises a two-storey detached dwelling and is located in a
predominantly residential area. The surrounding area contains various styles of
dwelling; however, they appear to have been constructed at a similar period as
part of a planned development. Many of the surrounding properties have been
extended and altered, including some with front extensions.
9. The main amendments from the approved plans comprise; the replacement of
the originally approved crown roof over the side extension with a dummy
pitched roof on the front elevation and a flat roof behind, the increase in width
(and decrease in height) of the front extension and amended rooflights.
1 See Flexible options for planning permissions: Guidance, March 2014 (Ministry of Housing, Communities & Local
Government)
Appeal Decision APP/R5510/D/19/3241440
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10. The dummy pitch roof would be positioned over the single storey side
extension. The materials to be used would match those in the main roof and
the roof over the proposed single storey front extension. Due to the angled
siting of the dwelling away from the street and the position of the side
extension, the dummy roof would not be a prominent feature of the property or
the street-scene. The presence of existing landscaping largely screens the side
elevation and would limit views of the drop to the flat-roofed element of the
extension when viewed from the street.
11. The Council comment that the height of the side extension at 3.2m, with the
dummy pitched roof at 4m, exceed the maximum heights outlined in the
Hillingdon Design and Accessibility Statement (HDAS) Supplementary Planning
Document (SPD) Residential Extensions (2008) which states that the roof
should not exceed 3.4m at its highest point and that, a flat roof single storey
extension should not exceed 3m in height. These measurements are also
repeated in Policy DMHD1 of the London Borough of Hillingdon Local Plan Part
Two - Development Management Policies (2020). I find that, despite a conflict
with Policy DMHD1 and the SPD, the height of the dummy roof and flat roofed
single storey side extension, that would be largely screened from view, would
not be out of character with the area where a number of other properties have
had similar extensions. I find that both the dummy roof and the flat roof of the
side extension, due to their size and use of materials to match the main
dwelling, would not dominate the host property or appear incongruous.
12. In relation to the single storey front extension, I find that due to its height,
width, depth and siting, it would be a relatively minor addition and would not
dominate the property or the street. The use of materials to match those of the
main dwelling and the alignment of the fenestration with the first floor would
result in the extension not appearing incongruous and would not harmfully alter
the overall appearance of the house. Whilst there are some other examples of
single storey front extensions to properties in the surrounding area, the Council
have commented that these do not appear to have been built with the benefit
of planning permission recently. Nevertheless, they are features in the
character of the area, if not a particularly dominant feature. In any event, I
find that the appeal proposal stands on its own merits and have determined the
appeal on this basis.
13. The Council have commented that the Residential Extensions SPD states that
front extensions that extend across the entire frontage will normally be
refused. This requirement is repeated in Policy DMHD1 of the Development
Management Policies. The front extension would not extend across the entire
frontage of the property. Given the appeal property is a detached dwelling, and
the extension is centrally positioned relative to the main body of the house, it
would not appear disruptive to the symmetry or balance of the property.
14. The proposal includes amended rooflights which are sited on top of the flat roof
rear extension. These are not referred to in the Council’s reason for refusal. I
find that, whilst they will be visible from surrounding residential properties,
they are relatively minor installations, not readily visible from public vantage
points and would not adversely harm the appearance of the property.
15. The variation of the disputed condition would therefore not have a harmful
effect on the character and appearance of the surrounding area. Although the
side extension and dummy roof would conflict with the measurements stated in
Appeal Decision APP/R5510/D/19/3241440
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Policy DMHD 1 of the London Borough of Hillingdon Local Plan Part Two -
Development Management Policies (2020) and those in the SPD, I find that no
harm is caused to the character and appearance of the area by this conflict. I
find that the proposal would comply with Policies DMHB 11 and DMHD 1
(insofar it relates to front extensions) of the London Borough of Hillingdon
Local Plan Part Two - Development Management Policies (2020). These policies
require that, all development, including extensions, will be designed to the
highest standards and, incorporate principles of good design including: i)
harmonising with the local context by taking into account the surrounding,
scale of development, considering the height, mass and bulk of adjacent
structures, architectural composition and quality of detailing; ii) ensuring the
use of high quality building materials and finishes. That applications relating to
extensions of dwellings ensure that: there is no adverse cumulative impact of
the proposal on the character, appearance or quality of the existing street or
wider area; new extensions appear subordinate to the main dwelling; new
extensions respect the design of the original house and be of matching
materials. And that front extensions must be minor and not alter the overall
appearance of the house or dominate the character of the street.
16. The proposal would comply with Policy BE1 of the London Borough of Hillingdon
Local Plan Part One - Strategic Policies (2012) which requires, amongst other
things that, new developments, including extensions, should achieve a high
quality of design.
17. Notwithstanding the conflict with the SPD outlined above, the proposal would
comply with the element of the SPD relating to front extensions, which outlines
that front extensions that extend across the entire frontage will normally be
refused.
Other Matters
18. Objections were received in relation to the impact of the development on the
living conditions of surrounding residents in relation to loss of light and privacy.
The impact of the development on the living conditions of occupants of
surrounding residential properties was not referred to in the Council’s reason
for refusal. I find that the effect on living conditions is not pertinent to the main
issue as the development, due to its design, scale and siting, would not cause
unreasonable harm to the living conditions of occupants of surrounding
residential properties with regard to loss of light or privacy. Furthermore, the
differences between the approved scheme and the plans before me are minor
and therefore the effect on living conditions are no greater.
19. Objection was received in relation to possible encroachment onto neighbouring
land and rainwater from the development falling onto adjacent gardens. I find
that these are civil matters between the parties involved and there would not
be reason to withhold planning permission on the basis of these matters.
20. Objection was also received on the basis that granting planning permission for
the proposal could set an undesirable precedent for future similar
developments in the area. Each application and appeal must be determined on
its individual merits, and a generalised concern of this nature does not justify
withholding permission in this case. Given that I have concluded that the
proposal would be acceptable, I can see no reason why it would lead to harmful
developments on other sites in the area.
Appeal Decision APP/R5510/D/19/3241440
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21. Objection was also received due to a suggested lack of communication between
the appellant and the occupants of surrounding residential properties. Whilst
such discussions can often assist the development process, the lack of such
discussions would not be a reason to withhold granting planning permission.
Conditions
22. In addition to the standard time limit condition (amended to relate to the
original consent), I have imposed a condition reflecting the variation to the list
of approved plans. I have retained those non-disputed conditions from the
previous permission that are still relevant. The condition in relation to matching
materials is in the interests of the character and appearance of the area, and
the conditions in relation to removal of permitted development rights and the
restriction of the use of the roof are in the interests of the living conditions of
occupants of surrounding residential properties in relation to privacy.
Conclusion
23. For the reasons outlined above, and taking into account all other matters
raised, I conclude that the appeal should succeed.
A M Nilsson
INSPECTOR
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