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.
5-bedroom, 3-bathroom duplex of 222 m², built in 1998. Located on rua Capitão Salgueiro Maia, 21, Algueirão-Mem Martins parish, Sintra municipality, Lisbon district. Noteworthy Features: This property includes two independent front entrances, enhancing privacy and accessibility, alongside a home cinema optimized from spacious layouts and direct access to a terrace with unobstructed views.
The valuation. The asking price of €495,000 sits significantly below the fair value of €834,363, marking a difference of €339,363 (68.6%). This property is clearly underpriced, offering a compelling investment opportunity.
Fair value modelled at €834,363 from the area baseline, adjusted for condition and location. Asking €495,000 sits €339,363 (68.6%) below — the upside to fair value.
Asking €495,000 versus the rua Capitão Salgueiro Maia, 21 area baseline of €643,578 (€2,899/m²) for a median-condition unit of this size — the gap before quality adjustments.
AI Condition Index 77/100 (Condition 75 · Materials 80 · Room dimensions 75). Above-median finish quality lifts fair value versus a baseline unit needing CapEx.
Neighbourhood score 71/100 (Housing Market 75 · Amenities 70 · Economic 70 · Tenant Quality 70). Strong amenities and housing-market momentum support a premium to baseline.
rua Capitão Salgueiro Maia, 21
Area baseline €643,578 + condition +€7,978 + location +€64,037 = modelled fair value of €834,363 (€3,758/m²), a €339,363 (68.6%) gap versus the €495,000 asking price.
| Reference | Status | Price | €/m² | vs subject | Condition | Location |
|---|---|---|---|---|---|---|
| rua Capitão Salgueiro Maia, 21 | Subject | €495,000 | €2,230 | — | 75 | 71 |
| Rio de Mouro · 82c83e | Active | €415,000 | €2,024 | 9.2% | 74 | 70 |
| Algueirão-Mem Martins · 6fb9c7 | Active | €395,000 | €2,970 | 33.2% | 75 | 71 |
| rua Vénus | Active | €185,000 | €2,056 | 7.8% | 72 | 72 |
| rua Florbela Espanca, 1 | Active | €375,000 | €3,125 | 40.2% | 72 | 68 |
| Median comp | €385,000 | €2,513 | 12.7% | 73 | 71 |
Long-term rental The 5-bed duplex in Algueirão-Mem Martins presents a compelling opportunity for long-term rental investment, as it is currently priced 68.6% below fair value. With a gross yield of 3.6% and decent condition and neighborhood scores, this property integrates well with the suburban dynamics influenced by Lisbon's economic reach. Family rental Offering ample space for families, this property is suitable for family rental given its size and suburban location, which benefits from proximity to Lisbon. The significant gap between the listing price and the fair value highlights its potential to attract long-term tenants seeking stable housing options. Buy-and-hold As a buy-and-hold investment, the duplex is well-positioned, given its substantial valuation gap and relatively attractive yield. Its appealing family-friendly layout and proximity to Lisbon make it a resilient asset for long-term appreciation in a growing suburban market.
Economic volatility risk With both the economic stability and tenant stability scores at 70/100, there is a potential risk of instability in rental income due to fluctuations in the broader economic environment affecting tenant retention and overall demand.
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