To ask Her Majesty's Government further to the Written Answer by Lord Myners on 15 March (WA 120), whether a conservatory is considered by the Valuation Office Agency when assessing the value of a dwelling for a council tax valuation or revaluation; and what estimate the agency has made of the average increase in capital value of a dwelling as a consequence of the addition of a conservatory.
The addition of a conservatory is likely to be value significant and would constitute a "material increase" under Section 24(10) of the Local Government Finance Act 1992. As such, it would not affect a council tax band unless and until a "relevant transaction" took place (and only then if it added sufficient value to put a property into a higher band).
In the event of a revaluation, the existence of a conservatory would be taken into account, as would any other feature, positive or negative, that affects value in the market at the time.
Dwellings are valued "as a whole" and as such the value of a conservatory is not separately calculated.