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.
4-bedroom, 3-bathroom duplex of 329 m², built in 2018, energy rating A. Located on rua da Castelhana, 173, Cascais e Estoril parish, Cascais municipality, Lisbon district. Noteworthy Features: The kitchen boasts high-quality Siemens appliances and a climate-controlled Liebherr wine cellar, while the upper terrace is designed for year-round entertaining with outdoor heaters and generous space for socializing.
The valuation. The asking price of €1,150,000 is significantly lower than the fair value of €1,429,477, presenting a potential savings of €279,477 (19.6%). This property is clearly underpriced for its market potential.
Fair value modelled at €1,429,477 from 6 comparable sales in the area. Asking €1,150,000 sits €279,477 (19.6%) below — the upside to fair value.
Asking €1,150,000 versus the rua da Castelhana, 173 area baseline of €1,020,355 (€3,101/m²) for a median-condition unit of this size — the gap before quality adjustments.
AI Condition Index 82/100 is above the parish average, lifting fair value versus a typical-condition unit.
Recent nearby listings price above the wider parish average — a hyper-local premium distinct from the parish baseline.
Base gap of €1,020,355, adjusted for condition and micro-location, gives a modelled fair value of €1,429,477 (€4,345/m²), a €279,477 (19.6%) gap versus the €1,150,000 asking price.
| Reference | Status | Price | €/m² | vs subject | Condition | Location |
|---|---|---|---|---|---|---|
| rua da Castelhana, 173 | Subject | €1,150,000 | €3,495 | — | 77 | 74 |
| Cascais e Estoril · 911352 | Active | €1,207,500 | €4,830 | 38.2% | 80 | 73 |
| rua Diogo Cão | Active | €1,100,000 | €4,400 | 25.9% | 80 | 68 |
| Cascais e Estoril · 9569be | Active | €795,000 | €4,184 | 19.7% | 75 | 71 |
| rua Nova da Alfarrobeira, 4 | Active | €1,990,000 | €4,383 | 25.4% | 75 | 73 |
| Median comp | €1,153,750 | €4,392 | 25.6% | 78 | 72 |
Long-term rental This property in Cascais e Estoril presents a significant investment opportunity with a gross yield of 6.1%, contributing positively to long-term rental cash flows. Additionally, the fair value is estimated at €1,429,477, indicating a 19.6% gap compared to the listing price of €1,150,000, emphasizing its attractiveness as a long-term rental asset. Family rental Given the size of 329m² and the family-friendly neighborhood with a rating of 74/100, this duplex is well-suited for family rental, ensuring stability and demand within the local market. The property’s condition score of 82/100 further enhances its appeal to families seeking comfortable living spaces in a prime suburb of Lisbon. Buy-and-hold The combination of a favorable gross yield of 6.1% and a fair value gap of 19.6% positions this property as a strong buy-and-hold investment in the Cascais e Estoril area. Its robust condition of 82/100 indicates durability, making it a valuable asset that can appreciate over time while generating steady rental income.
Potential Tenant Turnover The tenant stability score of 70/100 suggests a risk of higher turnover, which could lead to increased vacancy costs and potential loss of rental income.
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Comparables, condition and location workings, yield and time-to-sell. Written up and emailed to you.
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