I admit I made a pig's ear out of my meaning.
What I meant was there are an increasing number of young people who are renting because they can't afford to buy (well, get together a deposit). And a large part of that is because where rented housing was predominately council owned they are now private rented and so cost more due to the profit motive that has been introduced on top of the supply/demand pressures. Housing costs are rising much faster than wages.
You posted a couple of graphs. What I think you aren't considering here is the timescale. The number of owner occupied is increasing, but many of those will have been on mortgages for many of those years when it was far easier for younger people to get them. As you can see there has been a marked decline in mortgages in recent times even if that decline does appear to have leveled off. Meanwhile the number of private renters has increased a lot in the same time period while social housing has declined.
I think we need to think of these trends in 10-20 years time, or even longer. You can already see it, as some have alluded to. Houses that have traditionally been owned are now rented. As older people who owned the housing die (or need to sell to go into care) then the family's tend to not care who it's sold to - they just leave it to an estate agent to get the best price. Far too often that best price will be offered by someone looking to use it as an income stream and investment. I can personally attest to three such instances in my sister's road - houses owned by old people that are now rented accommodation. One is an HMO. At the moment it is prevalent in areas of houses that were built in say the 30's - they have been owned by people for decades as a family home and have died owning the property. When it has gone on sale the chances of it being snapped up by a landlord are much higher than in the past. How long before similar things start happening in places built in the 50's etc. as their long standing owners die? It's also prevalent around areas such as the universities - loads of new housing in Canley is now going up for private rent as student accommodation. It's seeping in slowly but you can see it happening.
Now, who can tell how that will progress during those years. Will the amount of students go down? Will the amount of purpose built student accommodation make it harder for the BtL student landlords to make money? As prices continue to increase and rents go up to maintain profit, at what point will it just become impossible for stagnant real-term wages to pay the asking price? We are already at the point where it is nigh-on impossible to save for a deposit as an ever-increasing percentage of the wages go on rent. That has progressed further in recent years and we are seeing people having to choose to heat or eat as much of their money is going on housing costs. Much longer and that won't be a choice - it will be neither as everything is going on just having the roof over your head.
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