Outbuilding at TW10 6RN
1. Your site at a glance
Two designations apply at this address: a Richmond conservation area and the borough-wide Air Quality Management Area. Garden buildings are often permitted development — but conservation area status narrows those rights, and scale, siting and visibility decide which side of the line a garden office falls. The good news is in the data below: this is among the most-approved project types we measure in this part of Richmond.
- Richmond AQMAView the official record →
- Richmond HillView the official record →
2. What applies here
The design tests for garden buildings — NPPF paragraph 135
Function and sympathy to setting are the operative criteria: a garden office that sits low, defers to boundary planting, and uses quiet materials passes these tests almost by construction. Height is the variable that causes trouble.
“Planning policies and decisions should ensure that developments: (a) will function well and add to the overall quality of the area, not just for the short term but over the lifetime of the development; (b) are visually attractive as a result of good architecture, layout and appropriate and effective landscaping; (c) are sympathetic to local character and history, including the surrounding built environment and landscape setting,”NPPF paragraph 135 — 12. Achieving well-designed places · read the source →
The permitted development baseline — PD guidance, Class E
Garden buildings 'incidental to the enjoyment of the house' are the textbook Class E case, and many garden offices need no application at all. Conservation area status tightens the limits — particularly siting between the house and a highway and the building's height — so check the envelope before committing to a design.
“This provides permitted development rights within the curtilage of a house for: (a) any building or enclosure, swimming or other pool required for a purpose incidental to the enjoyment”PD technical guidance, Class E — Permitted development: buildings etc incidental to the enjoyment of a dwellinghouse (outbuildings) · read the source →
Conservation weight reaches back gardens — NPPF paragraph 212
Conservation areas protect settings as well as streets. In Richmond that includes views between gardens and from public paths; a structure visible above fence lines invites heritage assessment that a lower one avoids entirely.
“When considering the impact of a proposed development on the significance of a designated heritage asset, great weight should be given to the asset’s conservation (and the more important the asset, the greater the weight should be).”NPPF paragraph 212 — 16. Conserving and enhancing the historic environment · read the source →
Proportionate evidence, not over-engineering — NPPF paragraph 220
If an application is needed, national policy keeps it proportionate: the question is what your garden contributes to the area's significance, and for most rear gardens the honest answer keeps the submission short.
“Not all elements of a Conservation Area or World Heritage Site will necessarily contribute to its significance.”NPPF paragraph 220 — 16. Conserving and enhancing the historic environment · read the source →
3. Potential blockers
Nothing in this category for your project — a genuine finding, not an omission.
4. Things to consider
Air Quality Management Area
This address is in an Air Quality Management Area (Richmond AQMA); air quality impacts may be a material consideration for some projects.
Conservation area
This address is in the Richmond Hill conservation area. Your council must give special attention to preserving or enhancing the area's character, which raises the design bar for external changes.
5. Approved nearby
Of the 85 decided outbuilding applications within 1 km of this address since 2015, 77 were approved and 8 refused — a 91% approval rate, the highest of any project type in our example set. Where consent is needed at all, well-scaled garden offices in this part of Richmond are approved as a matter of course. The handful of refusals involved height or forward siting; the approved examples below show the pattern.
- Approved · Outbuilding to rear garden. (2026-05-14) council record →
- Approved · Replacement Rear Outbuilding (Retrospective) (2026-02-02) council record →
- Approved · T1: Mimosa To reduce crown back to previous reduction points approx 1.5-2m. Tree is very close to outbuilding. (2026-01-21) council record →
- Approved · Rear outbuilding (2025-10-22) council record →
- Approved · Outbuilding in rear garden (2025-05-02) council record →
- Approved · Garden outbuilding. (2025-03-28) council record →
- Designations are read live from planning.data.gov.uk at generation time. Some councils have not yet published every dataset; absence of a designation here is absence from the national index, not a guarantee none exists.
- This example was generated with national policy and live designation data. Purchased reports also include the council's adopted Local Plan policies where the plan can be machine-read — and say so plainly where it cannot.
This is a professional screening report built from official public data. It is not legal advice, a planning decision, or a substitute for pre-application advice from your local planning authority. Always confirm requirements with your authority before starting work.