- 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
Before you decide in Sunbury-on-Thames
Construction on a Sunbury-on-Thames garden plot runs to a programme agreed once Spelthorne Borough Council has issued permission and any pre-commencement conditions have been dealt with. Groundworks and foundations come first; the shell and roof follow, then glazing, internal trades and, last of all, the drive and planting.
Weather matters. Around 21 December the sun in Sunbury-on-Thames climbs to only about 15° at midday, so winter days are short and wet ground slows the work. Where we can, we order the job so the house is weathertight before the worst months arrive.
What happens next in Sunbury-on-Thames
Once you ask for an appraisal of your Sunbury-on-Thames garden, we start with the paperwork: the title plan, any covenants, flood maps, tree and conservation designations, and planning decisions on nearby plots. A short call follows, then a site visit if the plot passes the desk check. You get our straight view of what’s realistic and what happens next, with no obligation to go further.
Free plot appraisal
We check the title plan, access, constraints and planning policy from our desk, talk the plot through with you, and visit if it looks viable. There’s no cost and no obligation.
Planning and approvals
We submit the planning application and manage it to a decision, then deal with conditions, Building Regulations approval, the structural warranty, any build-over agreement and the new utility connections.
Written quote and build
Once design and survey are complete you get a written quote. The build runs in stages — access and groundworks, foundations, frame and roof, fit-out and external works — with inspections at each key point.
Handover
You receive the completion certificate, warranty documents, Energy Performance Certificate, manuals and utility details, so the new home is ready to move into, let or put on the market.
Worth checking early
- Planning can be refused, and money spent on surveys, design and the application isn’t recovered if it is — which is why we start with an appraisal.
- Your own garden gets smaller and the new home will be visible from your house, so screening and separation matter for both homes.
- Building and selling a new home can change your tax position compared with selling only your house; take advice from a tax adviser first.
Your questions, answered for Sunbury-on-Thames
Can the new home in my Sunbury-on-Thames garden connect to the main sewer?
Usually, yes, but the route and depth decide how easily. The new home needs its own foul connection, agreed with the water company, and gravity drainage is simplest where the sewer sits lower than the new floor. If it doesn’t, a pumped connection may be needed. Where a public sewer runs under your garden, a build-over agreement or diversion may also be required.
Do you visit gardens in Sunbury-on-Thames before giving advice?
We start with a desk review of the title plan, access, constraints and planning policy, then talk the plot through with you. If it looks viable, we arrange a site visit to see the access, levels, trees and neighbouring windows for ourselves. The appraisal is free and carries no obligation.
Who decides planning for a garden house in Sunbury-on-Thames?
Spelthorne Borough Council decides applications for addresses in Sunbury-on-Thames, using the council’s Local Plan, national policy and its own design guidance. Neighbours and consultees such as highways officers can comment, and the decision is made by the council’s planning officers or, where the rules allow, its planning committee. Pre-application advice from the council can help test a scheme before the formal application is submitted.
Do new homes in Sunbury-on-Thames need a structural warranty?
If the house will ever be sold or mortgaged, in practice yes. Mortgage lenders usually expect a 10-year structural warranty on a new home, though some accept an architect’s or surveyor’s certificate, and a warranty provider inspects the work at stages during the build, so it has to be in place before construction starts. Building control approval is separate and also required; a buyer’s solicitor will ask for both.
Other options in Sunbury-on-Thames
- Build a home for family in your garden
- Joint venture on your garden plot
- Planning promotion for your garden plot
- Combine gardens with your neighbours
- Tandem and landlocked plots
- Sell part of your garden