Documents obtained under the Freedom of Information Act show millions of homes have already been secretly assessed by Labour in preparation for council tax hikes expected to target the middle class after the Election.
Homes have been given 'value significant codes' which will make virtually every desirable feature taxable.
Although not every home has been assessed, so far nearly 100,000 householders face being penalised simply for having a scenic view from their windows.
Even those who have a mere glimpse of a river, hill or park - or any other pleasing outlook - stand to pay more under a special category for 'partial scenic views'.
Worst hit among the 11 types of view are likely to be the 26,346 assessed so far as enjoying a full sea view and the 21,709 who overlook a golf course or farmland.
People with garages, conservatories and patios - and even parking spaces - are also in the firing line.
While the list is by no means complete, the figures indicate the chilling detail with which the inspectors are examining Britain's homes.
The documents also reveal the sheer pettiness of the new rules. Balconies are divided into those up to three square metres, three to five square metres and so on. The 'Conservatories' category even covers lean-tos and differentiates between single and double-glazed.
The Valuation Office Agency, which is compiling the massive database of every home in England, has divided the three-quarters of a million people with conservatories into four groups.
The 115,610 with double-glazed conservatories will be hit harder than the 43,821 with single glazing.
People with patios could be in for a shock. A total of 4,932 homes have been registered as having 'value significant' patios - Whitehall jargon for big ones, perhaps with built-in barbecues. There are likely to be tens of thousands more.