Planning Inspector dismisses appeal to build mansion in Christchurch Lane spinney

An Inspector has dismissed an appeal by developer Christchurchgrove Ltd against Barnet Council’s refusal of its planning application to build a 5-bedroom house in a wood in Chipping Barnet. The decision concludes a successful campaign by local residents, with help from the Barnet Society, to save a cherished natural habitat in the Monken Hadley Conservation Area. It also sends a message to developers about the Council’s commitment to protecting green spaces in Barnet.

Although only one acre in area, the spinney beside Christchurch Lane forms a link in a green chain connecting Old Fold Manor golf course and Hadley Green, both in the Green Belt. Both are also designated Areas of Particular Importance for Biodiversity in the Mayor of London’s Nature Recovery Plan. Many trees in the wood are subject to Tree Preservation Orders (TPOs) and it is a haven of wild life, for example the Muntjac deer and her fawn in the photograph above (courtesy of neighbour Marianne Nix).

Concerns arose two years ago, when it emerged that the Council had authorised the sale of the part of the spinney that it owns for £430,000, subject to the buyer obtaining planning consent. But its own planning and biodiversity officers took issue with aspects of the preliminary ecological appraisal commissioned by the developer and breaches of Barnet’s Local Plan.

In parallel local residents monitored wildlife in the wood, photographing and recording a fascinating range of birds, bats and animals coming and going within 200 metres of Barnet High Street (as reported in our web post on 31 January). A petition to Save Chipping Barnet Woodland was started in September 2025, and within a few months had been supported by over 2,250 signatures. 

A planning application was eventually submitted in January this year. It comprised a new mansion, designed in the Arts & Crafts style of existing houses in Sunset View, with a private garden and an enclosed swimming pool. In response to Society suggestions, the house boundaries were softened to integrate the garden more closely with the existing vegetation, and a plan was offered to manage the whole of the spinney. Despite constructive pre-application discussions between the developer and the Society, however, the final proposals did not go far enough to safeguard the existing environment and we objected to them – as did 278 other members of the public. Not a single comment was submitted in support.

Barnet planners recommended refusal of the application. Not only did the application breach several policies in its Local Plan (adopted only last year), it would have contradicted the Green Manifesto which had formed part of Labour’s platform in the 2022 local elections. Perhaps with an eye on the impending May local elections, the Council rejected the application on 10 March.

Almost immediately, the developer appealed against the Council’s decision.

The Planning Inspectorate’s verdict, published on 10 July, is unambiguous:

‘…the development of the site would have a harmful impact on the character and appearance of the area…and would fail to preserve the character or appearance of the Monken Hadley Conservation Area [MHCA]’, as well as being contrary to policies in The London Plan and the Barnet Local Plan.’

The Inspector echoed the opinion of local residents:

‘The sense of depth and scale that the woodland currently possesses is of considerable value…It provides a characterful wooded setting to the adjacent development and ties these roads into the wider landscape character of the MHCA…’

S/he also noted that,

‘This impact would be exacerbated by the proposed design…the proposed dwelling would appear to sit within an overgrown garden without a clear visual and spatial connection to the road or the sense of grandeur that many dwellings in the area possess.’

Regarding the hedge proposed around the site perimeter, the Inspector commented,

‘It is however highly doubtful that it would be possible to plant and successfully establish a continuous hedge in this location given the number of trees that would be retained around the edges of the site and their scale.’

Furthermore,

‘…the value of the woodland and the presence of a veteran tree, have not been accurately assessed, resulting in an unreliable biodiversity net gain calculation.’

The Society and campaigners have welcomed the Inspector’s decision. Retired GP Richard Norris commented,

‘Very definite rejection from Planning Inspector Tucker, very detailed, gives me faith in our institutions.’

Marianne Nix, who was instrumental in setting up the Save Chipping Barnet Woodland website and petition said,

‘I am delighted and hugely relieved that the Planning Inspectorate has dismissed the Appeal. The local community has worked together tirelessly to raise funds to publicise and to fight the potential destruction of this precious pocket of green on our doorsteps. Together we have gained the support of thousands of Barnet residents as well as petition signatures from all parts of the UK and even overseas. The World is waking up to the fact that we need to protect even the smallest pockets of nature and biodiversity that we in Barnet are lucky enough to enjoy.’

She thanked everyone who had objected to the planning application. But she went on to warn,

‘Although the veteran trees and wildlife are safe for now, I have a feeling there will be another application, this time with two or three houses.’

So we can’t relax. The Barnet Society was founded specifically to protect London’s Green Belt and the wider environment, and these are under greater threat than ever. We need funds to continue doing so. If you haven’t done so already, please join us or donate – just go to the top of this page.