Backland Development
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Planning permission for a garden plot in Sunbury-on-Thames

We offer planning applications for new homes on garden land in and around Sunbury-on-Thames: long back gardens, wide side plots, garage courts and yards behind houses. The aim is a complete, well-evidenced submission, not a hopeful one, and an honest view beforehand of whether it is worth making at all.

That means a measured survey and the right specialist reports, drawings that show access, turning, parking and bins, a design and character analysis, and clear evidence on privacy and daylight. We handle the submission, consultation responses and amendments, then explain the decision and any conditions in plain English.

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Architect’s desk with a site plan, floor plan, sections and elevations for a small new house
Planning authority
Spelthorne Borough Council
Postcodes
TW16, TW17
Noon sun, 21 March
About 39°
Shadow from a 5 m eaves line
About 6.3 m
Planning plan
Local Plan
County
Surrey

How it plays out in Sunbury-on-Thames

Overshadowing is a common objection to garden homes, so we answer it with numbers. At noon on 21 March the sun over Sunbury-on-Thames is about 39° above the horizon, and the shadow from a 5 m eaves line reaches about 6.3 m; on 21 December the sun rises to only about 15°.

Using those angles, we model shadows across neighbouring gardens and windows and adjust the height, position or roof shape of the new home until the effect is acceptable. Spelthorne Borough Council can then judge the scheme on evidence rather than impressions.

Section showing noon sun and shadows in Sunbury-on-Thames: about 39 degrees on 21 March and 15 degrees on 21 December21 m21 Mar, noon: sun 39°, shadow 6.3 m21 Dec, noon: sun 15°, shadow 18.5 mExistingNew home
This section is worked out for the latitude of Sunbury-on-Thames: around 39° of sun at midday in late March and about 15° at midwinter. It shows why the gap between your house and a new home behind it is about light as well as privacy. Garden assumed to face north.

How we’d take it forward in Sunbury-on-Thames

To start, send us your Sunbury-on-Thames address and a few photos of the garden, or give us a call. We check the title, access, constraints and nearby planning history, then talk it through with you. If the plot looks viable, we visit, explain whether an application is worth making and set out our fee and likely survey costs in writing.

  1. Free plot appraisal

    We review the title plan, access, constraints, policy and planning history around your address, then talk it through with you. If the plot looks viable we visit, and tell you plainly whether an application is worth making.

  2. Surveys and design

    A measured survey comes first, followed by the specialist surveys the plot needs, such as trees or ecology. The layout is designed around access, privacy, daylight, parking, bins and garden space for both homes.

  3. Pre-application advice

    Where policy is tight or the plot unusual, we put a draft scheme to the council’s planners first. Their written response shows which issues to fix before you pay the full application fee.

  4. Decision and next steps

    If permission is granted, we explain every condition and what must happen before work starts. If it’s refused, we review the reasons with you and set out the options: amend and resubmit, appeal, or stop.

Worth checking early

  • Neighbours have a formal say during consultation, and the council must weigh any planning objections they raise.
  • Planning is the council’s decision; even a well-prepared application can be refused, and the costs of preparing it aren’t recovered.
  • Permission doesn’t override private rights: covenants, ransom strips, sewer easements and party wall matters still need dealing with separately.

Questions about garden plots in Sunbury-on-Thames

What if my Sunbury-on-Thames garden application is refused?

You can submit a revised application that addresses the reasons for refusal, appeal within 6 months of the decision date, or decide not to go further. Appeals go to the Planning Inspectorate in England or Planning and Environment Decisions Wales. We review the refusal and the officer’s report with you before recommending a route.

How close to neighbours can a new home in Sunbury-on-Thames be?

It depends on the council’s guidance and the window layout. Many councils use around 21 metres between facing back windows and around 12 to 15 metres between a back window and a blank side wall, but the guide used by Spelthorne Borough Council decides. Screening, levels, roof form and window positions can all change what is acceptable.

Is pre-application advice available in Sunbury-on-Thames?

Most planning authorities, including Spelthorne Borough Council, offer pre-application advice, usually for a fee, with their own response times. It isn’t compulsory and doesn’t bind the final decision, but for a garden plot with a tight access, strict policy or an earlier refusal, it can show which issues to resolve before you apply formally.

What documents are needed for a garden plot application in Sunbury-on-Thames?

Spelthorne Borough Council publishes a local validation list, as every council does. Typically you need the forms, a location plan with the site and access edged in red, a site plan, floor plans, elevations, an ownership certificate and the fee, plus reports the plot calls for, such as trees, ecology, drainage and access. We prepare to the list for your address.

Other options in Sunbury-on-Thames

Garden plot planning near Sunbury-on-Thames

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