Buying property in Oeiras and Carcavelos as a foreigner (2026): neighbourhoods, prices and total costs

Where to buy in Oeiras and Carcavelos

The corridor runs west from Lisbon’s edge at Algés to Parede, along the Tagus estuary and then the Atlantic. Everything from Algés to Oeiras town, plus the inland parishes of Carnaxide, Porto Salvo and Barcarena, is in Oeiras municipality. Carcavelos and Parede are in Cascais municipality, so Cascais council rules apply there.

Prices below are idealista asking prices for August 2026 and INE medians actually paid over the 12 months to March 2026 (INE parish figures republished by a third party). INE publishes nothing below parish level.

Area	Character and property types	Price evidence	Tends to suit
Algés, Dafundo, Cruz Quebrada	First stops outside Lisbon on the Cascais line; riverside, mostly flats	Asking: Algés €5,178/m², Dafundo €5,189/m²; parish INE €4,553/m²	Commuters (Algés to Cais do Sodré in 11 min)
Miraflores	Newer district of flats and offices, uphill from Algés	Asking €5,435/m², the highest sub-zone in Oeiras	Professionals wanting lifts, parking and modern flats
Linda-a-Velha	Residential, inland from Algés	Asking €5,083/m²; parish INE €4,553/m²	Families priced out of Algés
Carnaxide and Queijas	Inland residential, next to large retail and business areas	Asking €4,282–€4,393/m²; parish INE €3,988/m²	Value-seeking families with a car
Caxias and Paço de Arcos	Historic riverside centres on the train line	Asking: Paço de Arcos €5,272/m², Caxias €5,231/m²; parish INE €4,373/m²	Buyers wanting the water and the train
Oeiras centre, Santo Amaro, São Julião	Town centre, marina and beach at Santo Amaro, the São Julião fort	Asking €5,100/m²; parish INE €4,373/m²	Families and retirees wanting services and a beach
Porto Salvo	Inland; Taguspark and Lagoas Park business areas	Asking €4,162/m²; INE €4,058/m²	People working at the parks; newer builds
Barcarena and Queluz de Baixo	Inland, semi-rural edges; Oeiras International School	Asking €4,370/m²; INE €3,733/m², the lowest in Oeiras	OIS families; houses with land
Carcavelos	Large surf beach, Nova SBE campus, St. Julian’s School	Asking: Carcavelos Centro €5,727/m², Junqueiro €6,429/m²; parish INE €4,870/m²	Beach-lifestyle buyers, international families, student-let investors
Parede	Seafront town, older villas and flats	Asking €5,622/m²; parish INE €4,870/m²	Retirees and families wanting a quieter Cascais-line town

Linda-a-Velha’s asking price rose 25.4% in a year on a small number of listings; treat it with caution.

What does a typical home cost?

INE figures are what buyers paid; idealista figures are what sellers ask. In this corridor asking prices run roughly 10–20% above INE medians.

Measure	Figure	100 m² home at that rate
INE median paid, Oeiras, Q1 2026	€4,511/m²	€451,100
INE median paid, Oeiras, 12 months to March 2026	€4,297/m²	€429,700
INE median paid, Oeiras new homes, 12 months to March 2026	€4,698/m²	€469,800
INE median paid, Carcavelos e Parede, 12 months to March 2026	€4,870/m²	€487,000
idealista asking, Oeiras, August 2026	€4,907/m²	€490,700
idealista asking, Carcavelos e Parede, August 2026	€5,403/m²	€540,300

On these figures, a 140 m² family house in Oeiras would cost about €632,000 at the Q1 2026 INE median and €687,000 at the August 2026 asking average, which is why we use €700,000 in the example below. Buyers domiciled abroad pay more: over the 12 months to March 2026 they paid a median above €4,300/m² in Oeiras, against above €3,400/m² for domestic buyers (INE).

Timing. Oeiras asking prices are still rising (+11.6% in a year to August 2026, a series high), while Carcavelos e Parede has flattened (+3.2%). In the wider Lisbon area, sales in Q1 2026 closed an average 4.4% below the asking price (Confidencial Imobiliário, via KW Alfa). idealista changed its methodology in July 2026, so do not compare these asking prices with older idealista figures.

The total cost of buying in Oeiras and Carcavelos

Since 25 May 2026, buyers who are not tax resident in Portugal pay a flat 7.5% IMT (property transfer tax) on the whole price of a home (Decree-Law 97/2026). Residents pay the normal sliding scale; between €660,982 (main home) or €633,931 (other homes) and €1,150,853, that scale is a flat 6%. Everyone pays 0.8% stamp duty on the price, plus 0.6% on any mortgage. The government’s Casa Pronta service charges €375 for the deed and registration without a mortgage and €700 with one.

Worked example: cash purchase, no mortgage.

	€600,000 flat	€700,000 family house
Non-resident: IMT 7.5%	€45,000	€52,500
Stamp duty 0.8%	€4,800	€5,600
Casa Pronta	€375	€375
Non-resident total	€50,175 (8.4%)	€58,475 (8.4%)
Resident, main home: IMT	8% − €13,763.35 = €34,237	6% flat = €42,000
Resident main home total	€39,412	€47,975
Resident, second home: IMT	8% − €12,699.89 = €35,300	6% flat = €42,000
Resident second home total	€40,475	€47,975
Extra IMT for a non-resident vs a resident main home	€10,763	€10,500

The €700,000 house is above €660,982, so a resident pays the flat 6% whether it is a main or a second home. With a €350,000 mortgage on the house, a non-resident adds €2,100 of stamp duty on the loan and pays €700 at Casa Pronta instead of €375: €52,500 + €5,600 + €2,100 + €700 = €60,900. Add your lawyer’s fee, a survey and any bank fees.

Three rules change the answer:

• Becoming resident. A buyer who becomes Portuguese tax resident within two years, or lets the home at a moderate rent, can reclaim the difference by applying within 6 months of qualifying.
• Former residents. The 7.5% rate does not apply to buyers who were Portuguese tax resident at any time before; they pay the normal scale.
• Above €1,150,853, residents also pay 7.5% flat, so the gap disappears.

Run your own figures in the buying cost calculator. IMT and stamp duty are paid before the deed.

Schools and commuting

International schools (checked on each school’s or the IB’s website):

School	Location	Curriculum	Ages
St. Julian’s School	Av. Jorge V, Carcavelos (Cascais municipality)	British international school founded 1932: English National Curriculum, IGCSE, IB Diploma and IB Career-related Programme; Portuguese bilingual section	3–18
Oeiras International School	Rua Antero de Quental 7, Barcarena (Oeiras)	Non-profit, parent-founded; full IB (PYP, MYP, DP)	6–18
St. Dominic’s International School	Outeiro de Polima, São Domingos de Rana (Cascais)	Full IB (PYP, MYP, DP)	3–18
CAISL (Carlucci American International School of Lisbon)	Linhó, Sintra municipality	American curriculum, US diploma and IB Diploma	Pre-K to Grade 12
TASIS Portugal	Penaferrim, Sintra municipality	IB and Cambridge IGCSE	Pre-K to Grade 12

CAISL and TASIS are reachable from Oeiras by car. The German School’s Estoril primary campus closes from the 2026/27 school year, after which Deutsche Schule Lissabon teaches only at its Lisbon site. Fees change every year; check them on each school’s website. Nova SBE, a business and economics school, has its campus on Carcavelos beach and says about 55% of its students are international.

Train to Lisbon. The Cascais line runs along the coast to Cais do Sodré. Stopping-train journey times from the CP timetable valid from 6 April 2026:

From	To Cais do Sodré
Algés	11 min
Cruz Quebrada	14 min
Caxias	17 min
Paço de Arcos	19 min
Santo Amaro	22 min
Oeiras	24 min
Carcavelos	27 min
Parede	29 min

Off-peak, trains run every 20 minutes; in the morning peak about every 15 minutes, plus extra trains between Oeiras and Cais do Sodré, so from Algés there is an inbound train roughly every 7–8 minutes. Miraflores, Linda-a-Velha, Carnaxide, Porto Salvo and Barcarena are inland, away from the line. The A5 motorway and the coastal Marginal (N6) both run to Lisbon; peak-hour driving times vary too much for us to quote a reliable figure.

Local rules buyers should check

• Two councils. Carcavelos and Parede fall under Cascais council, the rest under Oeiras; planning and short-let rules follow the council.
• Short lets (alojamento local, AL). Decree-Law 151/2026, of 30 July 2026, as reported by ECO, gives municipalities with more than 1,000 AL registrations until 31 December 2026 to decide on a regulation. We found no AL regulation, containment area or suspension for Oeiras or for Cascais on 24 September 2026, but have not confirmed this with either council. If you plan to let to Nova SBE students or holidaymakers, do not assume a new registration will be available; check with the council first.
• Licensing and the 1 October 2026 deed rule. From 1 October 2026 (Decree-Law 108/2026), the deed must state whether the habitation licence was shown, declared to exist, or does not exist; if that statement is missing, either party can seek to annul the sale. Buildings constructed before 7 August 1951 do not need a licence, which is relevant for older villas in Parede, Paço de Arcos and Oeiras centre. For newer homes, ask for the licence and check that extensions appear on the approved plans.
• Letting instead. idealista asking rents averaged €17.9/m² a month in Oeiras in August 2026 (+2.1% in a year) and €19.0/m² in the Oeiras–Paço de Arcos–Caxias parish. Homes let at up to €2,300 a month qualify for a 10% tax rate on rental income from 2026 to 2029.

Finding an agent in Oeiras and Carcavelos

In Portugal the listing agent is paid by the seller and acts for the seller. If you want someone on your side, use a buyer’s agent and agree in writing who pays them: an agency cannot be paid by both buyer and seller in the same deal (Lei 15/2013). Our list of English-speaking estate agents in Oeiras and Carcavelos gives offices, segments and IMPIC-checked licence numbers, without ranking them, including which agencies are closest to each international school. See also selling in Oeiras and Carcavelos, the Oeiras & Carcavelos hub, buying in Cascais if you are also considering Estoril, and costs of selling for when you later sell.

Key points

• Oeiras homes sold for a median €4,511/m² in Q1 2026 (INE); idealista asking prices were €4,907/m² in August 2026. Carcavelos e Parede: €4,870/m² paid (12 months to March 2026), €5,403/m² asking.
• Non-residents pay 7.5% IMT since 25 May 2026: €52,500 on a €700,000 house, against €42,000 for a resident. Taxes and deed costs: €58,475 against €47,975.
• The difference can be reclaimed if you become resident within two years or let at a moderate rent.
• Trains reach Cais do Sodré in 11 minutes from Algés, 24 from Oeiras and 29 from Parede; the inland parishes need a car.
• St. Julian’s is in Carcavelos, Oeiras International School in Barcarena and St. Dominic’s in São Domingos de Rana; CAISL and TASIS are in Sintra.
• From 1 October 2026 the deed must state the habitation licence position.