Off-Plan Property Marbella 2026: Risks, Returns and How to Buy Smart Off-plan property in Marbella is one of the most attractive investment strategies on the Costa del Sol in 2026 — and one of the most misunderstood. At its best, buying off-plan locks in today's price in a rising market, delivers 5-10% capital appreciation before you even receive the keys, offers flexible staged payments and gives you...