How does coordinating sale and purchase in Sweden work to avoid double housing costs?

Ideally, sell first and buy second so you know exactly how much money you have. If you buy first, you may need a bridging loan ("överbryggningslån") until you've sold. Negotiate handover dates ("tillträdesdatum") to match as well as possible. Many have a period with double housing costs ("boendekostnader") – plan and budget for this. If you sell with a condition about finding a new home, it weakens your negotiating position as seller. Have a realistic timeline and buffer for unexpected delays.