It's really hard to estimate the sufficiency of construction visually. What we notice is a change from the past trend.

However what's needed is sometimes entirely disconnected from the past trend. Ask a lot of people in San Francisco, and they will say that there's been a huge amount of building of new apartments, even though they are nowhere close to matching the 2% growth rate of US population, much less the much higher growth rate that a thriving urban area needs to match the trend of people moving from rural areas to urban areas, or to match an increased preference for urban life over suburban life.

It's because we see construction in a concentrated area where it is allowed, but then there are VAST areas off limits to anything but building a bigger house.

There's also pretty big restrictions on how high you can build in most places, I looked up the zoning document for Tower Hamlets and the parts of the borough allowing tall buildings is extremely tiny.