I tried to mention this in an older post but I thought its worth bringing up again due to the info. Most of this information is from a link included at the bottom.
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This image was designed independently of Liverpool FC in 2010/11 targeting the original
55,000 plans.
Expanded-Anfield 
A few months back the redevelopment proposals where made available to the public.
These plans showed that the green houses will be demolished to allow for expansion of the main stand.
The orange houses are to be demolished and the land is planned for a hotel.
The reason Anfield previously want able to be developed is not to do with the land issue but a residential shadow law that restricted the height of the stand. As the orange houses are no longer residential this restriction is removed meaning liverpool can in theory do what they want.
The only stumbling block now is that there is a certain road blocking one other stand. I assume that Anfield Road will be closed off and that the stand will expand over the road and likely back onto the park which will be opened up.
"Plans will involve rebuilding the Main Stand and a redesigned Anfield Road End, doing so in phases in order to avoid disruption to the overall capacity of Anfield. FSG’s redevelopment of Boston Red Sox’s
Fenway Park was done over a ten year period.
Monday’s news is expected to detail the housing regeneration area behind the Main Stand. This will crucially include the demolition of properties directly behind the Main Stand – thus allowing for a new stand to be built deeper and higher, a key stumbling block in plans for Anfield redevelopment over the last 20 years."
Those houses on the other side of Lothair Road, and parallel on Allroy Road, also play a key role as they will change their purpose from residential properties to commercial use. This area will be developed into a hotel, removing the
‘right to light’ that residential properties require and thus another key stumbling block finally removed.
Liverpool can then begin
building the new Main Stand behind the current one, a common practice in stadium redevelopment and as they did with the Centenary Stand in the early nineties. This will allow for minimal disruption to capacity while building works take place. Effectively scheduling the work can mean that the capacity would not see any reduction in capacity, with the final stage being completed during the close season.
The Main Stand, and Paddock Enclosure, currently holds just over 12,000 seats. A redeveloped Main Stand could take that capacity to nearer 20,000 and Anfield’s above 50,000.
The Anfield Road End’s current capacity is just over 9,000. Even if this were to be completely demolished, with the increased Main Stand capacity, it would bring the total capacity to a similar figure to the current Anfield during this second phase and construction of a new Anfield Road End.
The Anfield Road Stand could either be built over Anfield Road itself, or the road itself could be diverted around the new, deeper stand.
A new Anfield Road Stand could have a 15,000 capacity. Combined with the new Main Stand, that would bring a new Anfield total capacity of around 60,000.
