Question 1

How does the Ham and Petersham Conservation Area affect renovation work near Ham House in TW10?

Accepted Answer

The Ham and Petersham Conservation Area encompasses the riverside zone around Ham House and parts of the historic village streets. Within it, changes that would otherwise be permitted development — rear extensions, roofline alterations, modifications to windows or external materials — require a planning application instead. Controls are most stringent on properties closest to the Ham House estate; addresses further toward Ham Common and the park boundary generally fall outside the designated area and retain their standard PD rights. We confirm the position for your specific address at the first visit, and where a planning application is needed we handle it as part of the overall project scope.

Question 2

What does a rear extension cost on a Victorian terrace or interwar semi in Ham (TW10)?

Accepted Answer

A single-storey rear extension on a TW10 terrace or semi — covering foundations, structural frame, roof (flat, pitched, or with a lantern), and internal plastering and finishing — typically costs £50,000–£88,000. The most common pairing is a new kitchen within the extended footprint, which tends to bring the total toward the upper part of that range depending on specification. The quote is broken down line by line and handed over the same day as the visit; you will not receive a vague ballpark followed by a revised price once work starts.

Question 3

Do I need planning permission for a loft conversion on an interwar semi in Ham (TW10)?

Accepted Answer

Many interwar semis in Ham have hipped roofs rather than a straightforward gable end, which means a hip-to-gable conversion is usually the correct approach — the sloping hip is rebuilt as a vertical gable, creating the headroom and floor area a usable room requires. Under Richmond Borough's permitted-development rules, hip-to-gable conversions on houses outside the conservation area can generally proceed without a planning application, subject to height and projection limits. Properties within the Ham and Petersham Conservation Area require a planning application regardless of the works. We confirm which situation applies to your address and manage all the associated paperwork from there.

Builders inHam.

Services we deliver in Ham

Nearby areas we also cover

Commonquestions, Ham.

Let's talk through what you're planning.

Builders inHam.

Services we deliver in Ham

Nearby areas we also cover

CommonCommonquestions, Ham.questions, Ham.

Let's talk throughLet's talk throughwhat you're planning.what you're planning.

Commonquestions, Ham.

Let's talk through what you're planning.