This listing includes AI condition scoring, neighbourhood intelligence, and market valuation data — giving you a complete picture before you visit. Compare rental yield, price per square metre, and location strength against the broader Portuguese market to assess whether this property fits your investment strategy.
2-bedroom, 2-bathroom apartment of 105 m², built in 2003, energy rating C. Located on rua Água-Marinha, 137, São Domingos de Rana parish, Cascais municipality, Lisbon district. This apartment features an expansive 85 m² terrace, perfect for outdoor entertaining or gardening, and it is situated within a vibrant community close to essential amenities.
The valuation. The asking price of €489,000 is €75,063 (15.4%) above the fair value of €413,937, indicating that the property is overpriced. Buy-to-flip angle. A buy-to-flip strategy would involve renovating the apartment to enhance its appeal and reselling it at a premium to capture the heightened market demand. Buy-to-let angle. The rental income strategy aims for a gross yield of 3.9%, with estimated monthly rents around €1,589, appealing to families seeking a suburban lifestyle with proximity to Lisbon amenities.
Fair value modelled at €413,937 from the area baseline, adjusted for condition and location. Asking €489,000 sits €75,063 (15.4%) above — overpriced versus fair value.
Asking €489,000 versus the rua Água-Marinha, 137 area baseline of €389,655 (€3,711/m²) for a median-condition unit of this size — the gap before quality adjustments.
AI Condition Index 73/100 (Condition 70 · Materials 75 · Room dimensions 76). Below-median condition lowers fair value versus a renovated baseline unit.
Neighbourhood score 68/100 (Housing Market 70 · Amenities 65 · Economic 70 · Tenant Quality 65). Strong amenities and housing-market momentum support a premium to baseline.
rua Água-Marinha, 137
Area baseline €389,655 + condition -€3,773 + location +€28,055 = modelled fair value of €413,937 (€3,942/m²), a €75,063 (15.4%) gap versus the €489,000 asking price.
Long-term rental The asking price of €489,000 exceeds the fair value of €413,937, indicating that the property is overpriced by 15.4%. With a gross yield of 3.9%, this investment may not provide the desired return when considering the local rental market conditions. Buy-and-hold While the property offers potential for appreciation due to its proximity to Lisbon, its current price of €489,000 is above the fair value of €413,937, making it overpriced by 15.4%. Investors may find the yield of 3.9% gross unappealing in a relatively low-growth market environment. Family rental At €489,000, this apartment's price is 15.4% higher than the calculated fair value of €413,937, rendering it overpriced for family rentals. Tenants seeking family housing may be deterred by the upper pricing tier relative to comparable properties in the area.
Tenant turnover risk With a tenant stability score of 65/100, there is a significant risk of higher turnover rates, which can disrupt cash flow and increase vacancy costs.
