Then the order of work for refurbishing the kitchen is as it follows: 1). Re-route electrical wiring, if necessary; 2). Re-route plumbing, including gas pipes, if necessary; 3). Complete structural work on walls, ceilings and floors; 4). Install base units then wall units; 5). Fit worktops and any infill panels; 6). Fit sink and plumbing fittings; 7). Install hob and oven; 8). Fit extractor fan; 9). Wall and floor tiling; 10). Painting and decoration of the walls.