If its tenants were unable to pay rent, or it reduced its rent prices, it said, the number of affordable homes it could build would be drastically reduced, worsening the area's affordability in the long run.
Jan Crosby, the head of housing at KPMG, said: "These figures make for frightening reading and show that housing affordability is no longer just a problem for lower wage earners.
"It's where the equation of quality and affordability works, because it's in those markets you can replicate what the company has done in China".
"Despite our survey revealing a relatively high degree of confidence among consumers about their ability to stay on top of their debts, [the] affordability of the UK's household debt pile may come under pressure in the coming years.
Buyers can release equity from their home in their UK to help finance a property purchase abroad, although new affordability criteria coming into force on 26 April may make it tougher to convince a lender you can really finance the payments from your income.
Johnson said there was a "massive affordability gap" in the housing market and that he was concerned that ordinary Londoners were struggling to pay rent.
Nicola Sturgeon has been challenged over the affordability of hefty spending pledges after she launched an explicit bid to coax Labour into an anti-Tory alliance at Westminster.
Footnote: The original Watts Grove Depot housing scheme, which is in Bromley-by-Bow, had to be shelved by the mayor on grounds of affordability, resulting in Labour and Conservative councillors voting for an investigation into the deal.
Sharp divisions within the figures exist not only geographically but also between generations – those in their 20s and 30s, realising that they might never have it as good as the generations above them, have markedly different concerns to the majority, mostly to do with the affordability of housing.
Ask anyone why they go to these pubs and they'll mention two things: affordability and reliability.
Speaking to his colleagues at a Labor caucus meeting on Tuesday, Shorten said housing affordability was "a complex area but one we must continue to look at and work on".
