Group by original listing date, but keep the neighbourhood boundaries tight. Two Dublin flats in the same price band may be serving quite different buyers if transport, immediate surroundings or development stage differ.
Also, what exactly do you mean by lease length and the monthly...
Is the townhouse in a managed development, and do you already know the service charge amount and when it falls due? That could materially change the calculation. I’d also ask the lender or solicitor for the exact first-payment timing rather than assuming a normal monthly gap. Finally, is the...
Which parts of Dublin are you grouping together? Neighbourhood boundaries can produce misleading comparisons even within a narrow price band. I’d also separate routine maintenance from work that affects whether the property can be used as intended. Without that distinction, two warehouses at...