Ex-local authority flats and what lenders check

Ex-local authority flats are mortgageable, but lenders often set tighter limits on them than on equivalent private flats. The criteria I have read turn on three things: the height of the block, whether the front doors open onto an external walkway, and how much of the block is in private hands. This guide reads each lender’s published wording and notes where they differ.

Block height and storey limits

Virgin Money’s published lending criteria for brokers for brokers say that ex local authority, housing association or MOD flats must not be in a building of over 7 storeys, and that they are acceptable to 85% LTV. On the same flats page, flats in buildings with 4 storeys or fewer are acceptable to 95% LTV.

Other lenders draw the line differently, and some split it by region. Aldermore’s property and valuation policy guide for brokers, dated September 2026, sets limits for ex local authority flats of 10 storeys including the ground floor in London and the South East and 6 storeys in the rest of the UK. It words the limit slightly differently in two places, so check the exact figure with your broker. The Mortgage Lender’s residential property criteria for professional intermediaries, dated June 2026, allow a maximum of 5 floors in the block for ex-local authority properties in England and Wales, or 10 in London and the South East, with a maximum loan to value of 75%.

The table below sets the three lenders' published criteria side by side.

Lifts matter as well. Virgin Money says flats on the 5th storey or higher must be serviced by a lift, Aldermore treats a flat higher than the 4th floor in a block with no lift as unacceptable, and The Mortgage Lender lists properties of more than 4 storeys without a lift as unacceptable.

The same flat can pass at one lender and fail at another, and where it sits in the country can change the answer. A flat in an eight storey block in London is within Aldermore’s ten storey limit, while the same block in Manchester would be over its six storey limit. Check the limit before you book a valuation.

Deck and balcony access

Deck access means the front doors open onto an external walkway along the face of the block rather than onto an internal corridor. Lenders treat it differently.

Virgin Money says deck or balcony access is acceptable subject to valuer comment. Aldermore says balcony and open deck access arrangements to the block are not acceptable, and lists ex-public sector flats with balcony or deck access among its unacceptable property types. The Mortgage Lender’s criteria do not mention deck or balcony access at all. The same flat can therefore be acceptable at one lender and refused by another, so ask about access to the block and check the lender’s rule before you commit.

Lenders do not publish a private ownership percentage

Lenders do look at how much of the block is privately owned, but none of the residential criteria I read gives a number. The Mortgage Lender says ex-local authority properties in areas where the majority of homes are not in private ownership will be considered case by case, and lists as unacceptable ex-local authority houses in an area where the majority of housing remains in local authority ownership, as confirmed by the valuer. Aldermore says the property must be readily saleable and not an individual owner occupied flat within a local authority tenanted block. Nationwide’s pre-valuation enquiry form for brokers has a field headed “Percentage of Ex Local Authority” in its section for flats.

You are unlikely to find a threshold in the published criteria. Ask the selling agent how many flats in the block are owner-occupied and whether any flat in the block has completed with a mortgage in the last year. A valuer who has already signed off a neighbour is a useful signal, though it is not a guarantee.

The value gap shows up as a deposit

We have not found an official published figure for the discount on ex-council flats compared with similar private flats. The gap you can calculate is the one the loan limits create.

Take a flat valued at £180,000. At Virgin Money’s 85% limit for ex-local authority flats, the deposit is £27,000. A comparable private flat in a building of 4 storeys or fewer, at that lender’s 95% limit, needs £9,000. At a lender that caps ex-local authority flats at 75%, as The Mortgage Lender does, the deposit is £45,000. Using these three limits, the same £180,000 flat needs between £9,000 and £45,000 of your own money, depending largely on who owned the block and which lender you use. Our guide to loan to value explains how those bands work.

That gap can follow the flat to your buyer, who will need the deposit the criteria impose rather than the deposit the price implies. Our guide to what makes a property unmortgageable covers the other features that can narrow the pool of lenders.

Check for a pre-emption period

Gov.uk says that if you sell a home within 10 years of buying it through Right to Buy, you must first offer it to your old landlord or another social landlord in the area. The Mortgage Lender lists ex-local authority properties that are subject to a pre-emption period as unacceptable. Our guide to selling a Right to Buy home explains the first refusal rules from the seller’s side.

Ask your solicitor early whether any pre-emption period still applies, get the official copies of the register, and raise the height, access and ownership points as specific questions rather than waiting for the valuation. Our list of questions worth putting to a conveyancing solicitor before you instruct one is a sensible place to start.