Garage conversion plans in Richmond upon Thames

Conservation areas, world heritage and the listed stock

Richmond upon Thames publishes 85 conservation areas, and Historic England lists 819 entries inside the boundary. 1 World Heritage Site also touches the boundary, and its setting is a planning matter.

In a conservation area the council can ask for more than neat brickwork. It looks at the proportion of the opening, the type of window, the depth of the reveal and whether a front garden or a boundary wall is being altered. We draw each of these on the elevation, and we show the context houses beside yours so the officer can compare at a glance.

If your house is listed, or stands next to a listed building, we start with a heritage question and bring in a separate statement where one is needed.

Does a Richmond garage conversion need an application?

National law starts from a helpful point: Works affecting only the interior, or not materially affecting external appearance, are not development. A garage that stays a garage from the street can usually be fitted out without an application, unless a condition on the original permission says otherwise. We read the history for the address before we say so.

In a conservation area the exterior is the whole story. Replacing the door with a wall and window changes the elevation, and the council will expect materials that match. Where that applies, the application is built from our planning drawings in Richmond upon Thames. Where the position is clear, a lawful development certificate in Richmond upon Thames records it.

If a tree stands near the drive or the neighbour's wall is shared, we mention it in the first note, so the application does not meet a surprise.

Richmond's decision record and local values

Richmond upon Thames granted 83.3 per cent of householder applications in its latest twelve published months, and decided 98.3 per cent within eight weeks or an agreed extension. The timing figure is high, which suggests a council that keeps to its clock, but the grant rate shows that refusals happen, so a front that ignores its street is a real risk.

The average home sold for £803,249. The borough sits in band 1 of the Mayor's levy at £96.97 per square metre, and has its own residential levy: £418.41/m² (Residential Higher Band); £317.99/m² (Residential Lower Band). A conversion inside the existing walls adds no new floor area, so these charges are not normally the issue, and we note any exception in the handover.

Ventilation, escape and the set itself

Old garages are often airtight in the wrong way: no windows and one door. A habitable room needs controlled air, and Approved Document F gives extract rates for rooms you add: Intermittent extract: kitchen 30 l/s with cooker hood (60 l/s otherwise), utility 30 l/s, bathroom 15 l/s, WC 6 l/s. A bedroom also needs an escape window, which Approved Document B sets as Escape window: unobstructed openable area at least 0.33 m², at least 450 mm high and 450 mm wide, bottom of opening no more than 1100 mm above floor.

We show both on the drawings, so the opening that suits the street is also the opening that passes. The set costs £695, VAT included and fixed. A second chartered technologist checks each sheet, and if the council asks for changes we redraw them free. Building control details are in our building regulations drawings in Richmond upon Thames.

Neighbouring councils

Along the river, see garage conversion plans in Hounslow, garage conversion plans in Kingston upon Thames and garage conversion plans in Wandsworth. The borough's overview is at architectural drawings in Richmond upon Thames, and the garage conversion plans service page covers the general method.