Abstract: This work investigates the impact of heterogeneity on the surface energy balance (SEB) in vegetated urban areas by performing large-eddy simulation for a number of neighbourhoods. The neighbourhoods have identical plan fraction, vegetation plan fraction and frontal aspect ratio and as such, they would be considered almost identical by most land-surface models. The neighbourhoods differ in how buildings and green space are internally distributed, which is achieved using a  pseudo-random urban landscape generator. Periodic, statistically steady state simulations are run using uDALES, a building-resolving large-eddy simulation model with two-way coupled SEB scheme. Comparisons are made between the average SEB values within each neighbourhood.