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, 4-bathroom duplex of 431 m², built in 2022, energy rating A. Located on rua Oeiras, 3, Porto Salvo parish, Oeiras municipality, Lisbon district. This property features a 150 m² exclusive rooftop terrace with customizable leisure options, including potential for a Private Wellness Club, enhancing luxury living in Porto Salvo.
The valuation. The asking price of €1,070,000 is significantly below the fair value of €1,676,014, presenting an undervalued opportunity with a difference of €606,014 (56.6%). This positions the property attractively for potential buyers. Buy-to-flip angle. The buy-to-flip strategy involves acquiring the duplex at this undervalued price, upgrading its already high-quality finishes, and then flipping it for a profit in a stronger market for family homes. Buy-to-let angle. With a gross yield of 0%, the rental income strategy focuses on capital appreciation while targeting long-term family rentals, as suburban Lisbon offers safe, desirable living environments that attract tenants willing to pay premium rents.
Fair value modelled at €1,676,014 from the area baseline, adjusted for condition and location. Asking €1,070,000 sits €606,014 (56.6%) below — the upside to fair value.
Asking €1,070,000 versus the rua Oeiras, 3 area baseline of €1,804,166 (€4,186/m²) for a median-condition unit of this size — the gap before quality adjustments.
AI Condition Index 85/100 (Condition 80 · Materials 90 · Room dimensions 85). Above-median finish quality lifts fair value versus a baseline unit needing CapEx.
Neighbourhood score 74/100 (Housing Market 70 · Amenities 70 · Economic 80 · Tenant Quality 75). Strong amenities and housing-market momentum support a premium to baseline.
rua Oeiras, 3
Area baseline €1,804,166 + condition +€53,875 + location +€142,085 = modelled fair value of €1,676,014 (€3,889/m²), a €606,014 (56.6%) gap versus the €1,070,000 asking price.
| Reference | Status | Price | €/m² | vs subject | Condition | Location |
|---|---|---|---|---|---|---|
| rua Oeiras, 3 | Subject | €1,070,000 | €2,483 | — | 80 | 74 |
| Oeiras e São Julião da Barra, Paço de Arcos e Caxias · 6d51a1 | Active | €780,000 | €4,483 | 80.6% | 79 | 63 |
| rua Actor António Sacramento, 2 | Active | €2,285,000 | €6,491 | 161.5% | 85 | 75 |
| estrada de Porto Salvo | Active | €950,000 | €4,338 | 74.7% | 78 | 76 |
| rua António Sérgio, 12 | Active | €439,500 | €3,208 | 29.2% | 70 | 74 |
| Median comp | €865,000 | €4,411 | 77.7% | 79 | 75 |
Long-term rental This property offers significant potential for long-term rental returns, with a fair value indicating a 56.6% upside. With a condition score of 85/100 and a neighbourhood rating of 74/100, it is well-positioned to attract stable tenants in suburban Lisbon. Family rental Ideal for family rental, this duplex's spacious 431m² layout and suburban amenities make it attractive for families seeking a comfortable living space. Given the fair value assessment, this property is likely to provide a strong demand from long-term family-oriented tenants. Buy-and-hold As a buy-and-hold investment, the discrepancy between the listing price and fair value suggests substantial appreciation potential over time. The solid condition and moderate neighbourhood score indicate that this property is poised for value growth, making it a strategic addition to a long-term investment portfolio.
Economic Volatility Risk The economic stability score of 80 indicates moderate economic health, which could lead to potential fluctuations affecting rent prices or tenant turnover in unfavorable conditions.
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Comparables, condition and location workings, yield and time-to-sell. Written up and emailed to you.
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