Question 1

Balham SW12 rear extension — what's the likely cost for a wide Edwardian property?

Accepted Answer

A single-storey ground-floor addition forming a kitchen-dining room on a broad SW12 Edwardian semi typically costs between £57,000 and £102,000. The wider double-fronted houses on roads near Balham station tend toward the top of that band because the structure and glazing runs are longer. Wrapping the extension round into a side return adds to the cost but significantly increases usable floorspace. Most standard rear additions in SW12 qualify as permitted development, though a larger scheme or an addition that exceeds your neighbour's fence line will need a planning application. A party-wall notice must be served on adjoining properties before any foundation work begins.

Question 2

Can I build a loft conversion on my Balham terrace under permitted development?

Accepted Answer

Most standard rear dormers on Victorian and Edwardian terraces in SW12 qualify under permitted development rules, meaning no full planning application is required — provided the addition does not exceed set volume limits or alter the front roofline. A hip-to-gable conversion, which is popular on the semi-detached properties off Balham Park Road, changes the roof profile and typically does need a planning application. We confirm eligibility at the survey, and where permitted development applies we recommend obtaining a lawful development certificate, which provides documentary evidence of your legal right to build and protects you when the property is sold.

Question 3

What do full house renovations typically involve on Balham's period properties?

Accepted Answer

A complete renovation of a period property in Balham, SW12 — whether an Edwardian semi or a Victorian terrace — generally covers a rewire and replumb, a new boiler via our Gas Safe registered partner, a kitchen refit, one or more bathroom refits, and new flooring and decoration throughout. When structural work such as a rear extension or loft conversion is included in the same programme, the total programme usually runs fourteen to twenty weeks depending on scope. We split the quote into structure, services, kitchen, bathrooms, and finishes so each budget line is visible before you commit.

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