You can use a changing bag if your are house proud. The enlarging does not need 100% dark like film, only the actual exposure needs the safelight, you can then develope in a 'tube' in daylight. An inner room like an under stairs cupboard is ideal for neg dev and enlarger exposure, if you only enlarged at night you only need black blind material, on a bathroom.
Few of us have prof style dark rooms with large sinks and wall enlargers etc.
Noel