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.
3-bedroom, 3-bathroom apartment of 194 m², built in 2005, energy rating D. Located on rua das Castanholas, Santa Maria e São Miguel, São Martinho e São Pedro de Penaferrim parish, Sintra municipality, Lisbon district. This apartment offers stunning views of the surrounding Sintra mountains and is within walking distance to beautiful natural parks, enhancing its appeal for outdoor enthusiasts.
The valuation. The asking price of €689,000 is significantly above the fair value of €453,260, presenting an overpricing of €235,740 (34.2%). This suggests that the property does not offer a compelling investment opportunity relative to its true market value.
Fair value modelled at €453,260 from the area baseline, adjusted for condition and location. Asking €689,000 sits €235,740 (34.2%) above — overpriced versus fair value.
Asking €689,000 versus the rua das Castanholas area baseline of €601,012 (€3,098/m²) for a median-condition unit of this size — the gap before quality adjustments.
AI Condition Index 74/100 (Condition 75 · Materials 80 · Room dimensions 70). Below-median condition lowers fair value versus a renovated baseline unit.
Neighbourhood score 74/100 (Housing Market 78 · Amenities 65 · Economic 75 · Tenant Quality 72). Strong amenities and housing-market momentum support a premium to baseline.
rua das Castanholas
Area baseline €601,012 + condition -€3,031 + location +€39,967 = modelled fair value of €453,260 (€2,336/m²), a €235,740 (34.2%) gap versus the €689,000 asking price.
| Reference | Status | Price | €/m² | vs subject | Condition | Location |
|---|---|---|---|---|---|---|
| rua das Castanholas | Subject | €689,000 | €3,552 | — | 75 | 74 |
| Santa Maria e São Miguel, São Martinho e São Pedro de Penaferrim · 93764a | Active | €979,000 | €3,484 | 1.9% | 88 | 74 |
| Santa Maria e São Miguel, São Martinho e São Pedro de Penaferrim · 001bf8 | Active | €650,000 | €5,200 | 46.4% | 78 | 68 |
| rua dos Ventos, 1 | Active | €300,000 | €3,448 | 2.9% | 74 | 73 |
| rua Moinho do Zangão | Active | €730,000 | €4,056 | 14.2% | 72 | 75 |
| Median comp | €690,000 | €3,770 | 6.2% | 76 | 74 |
Long-term rental The property is overpriced with a listing price of €689,000 compared to the fair value of €453,260, indicating a significant gap of 34.2%. With a gross yield of 4.4% and a moderate condition rating of 74/100, this investment may struggle to deliver expected returns in a competitive rental market. Family rental Despite the suburban appeal for families, the €689,000 asking price significantly exceeds the fair market value of €453,260, reflecting a gap of 34.2%. Given the average condition rating of 74/100 and a neighbourhood score of 74/100, potential rental income might not justify the initial investment cost. Buy-and-hold The buy-and-hold strategy is challenged by the property's overpriced listing at €689,000, far above the fair value of €453,260, creating a notable gap of 34.2%. The property's condition and neighbourhood ratings of 74/100 suggest limited appreciation potential, making long-term holding less appealing at this price point.
Tenant turnover risk The tenant stability score of 72/100 indicates a potential for higher turnover rates, which could disrupt consistent rental income.
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