building clear cleared development empty fences foundation work foundations groundwork land level levelling levels property ready for building sand sand pads suburban urban vacant vacant block abstract appearance compacted compacting firm firming flatten flattened leveled leveling levelled mark marked preparation prepared preparing sandpad work workmen yellow yellow-sand foundation-work ready-for-building sand-pads vacant-block bricks construction fencing real estate solid wall charity helpers men at work not-for-profit paving paving slabs preparing sand rail rake reflections shovel slabs steps voluntary volunteer workers volunteers workers