Oh dear, it is not a transcription error - the original tithe apportionment (1841) says JB was living in plot 327. If so, it is possible James and Mary Bevington moved in the 1830s from Bermondsey to a smaller house (on plot 327), then some time later along the road to the larger Ivy House (plot 273) - if so, when? Judging by the street names in 1851, it looks as though they are in Ivy House in 1851. But were they already there in 1841? If so, the error was in the original. Check which. Who was living in 273 in 1841? The fact that the plots contain the same three numbers rearranged is slightly odd, but not impossibly so.
Source: etc etc. Tinted by PB.
Source: etc etc. Tinted by PB.
This is what I wrote at the time:
Plot 327 looks far too small to be "Ivy House", the gardens of which seem vast - certainly roomy enough to have a croquet lawn, vegetable plot, wild area etc. Is it possible to estimate the size of the plot?
Also, the house looks on the tithe map to be the right-hand house of a semi-detached pair. Unless all the photographs of Ivy House have been flipped, they all show it as the left hand house.
The photographs suggest Ivy House's footprint/ground-plan was quite complex - with substantial parts added, including a conservatory. The Tithe map, which is admittedly earlier, shows the house footprint as a simple rectangle, but there seems little space to add anything of any size.