Complex sentence: Next-door to Lunar House at 36 Wellesley Road is a very similar block, Apollo House, also housing government offices, and further along Wellesley Road is Voyager House, another former IND building.
Split into simpler sentences: Next-door to Lunar House at 36 Wellesley Road is a very similar block, Apollo House. Further along Wellesley Road is Voyager House, another former IND building.