Best English-speaking estate agents in Cascais and Estoril (2026)

How we built this list

We included an agency if it has an office in Cascais municipality (or, for buyer’s agents, says it covers Cascais), works in English, shows an AMI licence number on its website and markets to international clients. We first read each website, including the legal footer, and checked every AMI number on the IMPIC public register on 24 September 2026. On 14 October 2026 we reloaded every agency’s website and re-ran all 16 licence numbers on IMPIC: each still matched one active licence in the company’s name, and we added The Agency Cascais and the buyer’s agent Portugal Buyers. IMPIC shows the registered seat, which can differ from the office.

Portugal Owners is listed first because it is our own free matching service; it is not an estate agency. No agency paid to be listed. The agencies are not ranked; they are grouped by type and listed alphabetically. If a fact here is wrong or out of date, tell us through the contact page.

Selling a villa above €1.5m? Our luxury estate agents in Cascais list covers the prime offices in more depth.

Not sure which to choose? Start here

Portugal Owners: free agent matching

Portugal Owners is an independent English-language guide, not an estate agency. Contacting one agency gets you one opinion, and an agency pitching for your listing has a reason to quote high. Tell us about the property once and we ask two or three agencies from this list that suit it for a price estimate, so you compare like with like. Buyers get the agencies and buyer’s agents that hold the kind of home they want, because Portugal has no shared listings system like the US MLS and each agency mainly shows its own stock. It’s free, no agency pays to be listed, and your details go to no agency until you choose. Tell us about your property.

Tradeoff: we don’t list, value or sell property ourselves, so viewings, pricing and the sale itself are handled by the agency you choose.

Who are the best estate agents in Cascais?

No regulator or independent body ranks them, so the best agency is the one whose segment, office location and languages fit your property. This shortlist matches common Cascais and Estoril sales to agencies whose own websites state that focus; it is not a ranking.

If you are selling…	Agencies whose stated focus fits	What they state
A villa in Quinta da Marinha, Birre, Areia or Guincho	Afinest, Engel & Völkers Cascais, Porta da Frente Christie’s, Portugal Sotheby’s (Cascais), The Agency Cascais	Luxury segment; Engel & Völkers’ shop is in Quinta da Marinha, Afinest’s is in Bairro do Rosário by Birre, and Porta da Frente markets Guia, Rosário and Birre as villa areas
A flat or villa in Estoril, Monte Estoril or São João	Castelhana, KW Select Cascais, Portugal Sotheby’s (Estoril), Quintela + Penalva, RE/MAX Collection Costa do Sol, Rose Real Estate	Offices in Estoril or Monte Estoril
A mid-priced flat in Parede, Carcavelos, Alcabideche or São Domingos de Rana	KW Select Cascais, Rose Real Estate	All price segments (KW); sales and lettings for 30+ years (Rose)
A new-build or off-plan unit	Castelhana, Porta da Frente Christie’s, Quintela + Penalva	New developments named as a focus
To German, Russian, Swedish or Chinese speakers	Engel & Völkers Cascais, Inside Living	Languages listed include German and Russian (E&V); eight languages including Chinese and Swedish (Inside Living)
A home you might let instead	Rose Real Estate	Handles lettings and property management as well as sales
Nothing: you are buying	Brint, Goldcrest, Portugal Buyers	Buyer-only representation

Ask two or three for a valuation backed by completed sales in your own street or estate, and compare commission in euros (see the cost table below).

Comparison table

Agency	Type	Segment	Languages (stated on website)	AMI licence (verified on IMPIC)	Says it acts for buyers
Portugal Owners	Free matching service (not an estate agency)	All segments, sellers and buyers	English	Not applicable	Suggests 2–3 agencies that fit your property
Castelhana (a Dils company)	Network	Upper-mid to luxury, new developments	Website in EN, FR, PT	3497 and 24280	Not stated
Engel & Völkers Cascais	Network (franchise)	Residential, investment, luxury	DE, ES, EN, PT, FR, RU	18136	Not stated
KW Select Cascais (Keller Williams)	Network (franchise)	All segments	Website in EN, PT	16720	Not stated
Porta da Frente Christie’s	Network (Christie’s affiliate)	Upper/luxury, new developments	Not stated; publishes English pages	6335	Not stated
Portugal Sotheby’s International Realty, Cascais	Network (licensee)	Luxury	Website in PT, EN, FR, ES	23153	Not stated
Portugal Sotheby’s International Realty, Estoril	Network (licensee)	Luxury	Website in PT, EN, FR, ES	7744	Not stated
Quintela + Penalva | Knight Frank	Network (Knight Frank associate)	Upper/luxury, new developments	Website in EN, PT	6182	Offers “Private Consulting”
RE/MAX Collection Costa do Sol	Network (franchise)	Premium	Website in PT, EN, FR	11128	Not stated
RE/MAX Collection Team	Network (franchise)	Premium	Website in PT, EN, FR	13010	Not stated
The Agency Cascais	Network (US brand, Portuguese operator)	Luxury	Website in EN, PT, FR, ES	21865	Not stated
Afinest Luxury Real Estate	Boutique	Luxury	Website in PT, EN, FR	9585	Not stated
Inside Living	Independent	Upper/luxury	PT, EN, ES, FR, Chinese, RU, SV, DE	8417	Not stated
Rose Real Estate (RRR)	Independent	Sales and lettings	Website in EN, PT	6703	Not stated
Brint	Buyer’s agent	Buyer representation	Website in EN	19563	Yes, buyers only
Goldcrest Advisers	Buyer’s agent	Buyer representation	Says it has advised 32 nationalities	23310	Yes, buyers only
Portugal Buyers	Buyer’s agent	Buyer representation	Website in EN	26180	Yes, buyers only

A listing agency acts for the seller under the mediation contract (contrato de mediação imobiliária), and one agency cannot be paid by both buyer and seller in the same deal (Lei 15/2013, article 17(2)(a)).

What sells where in Cascais and Estoril?

Cascais municipality has four parishes, and the parish is the smallest unit with an official price. INE (the statistics office) publishes the median actually paid on completed sales; idealista publishes average asking prices. Sub-areas such as Quinta da Marinha or Monte Estoril have no official series of their own.

Sub-area	Parish	Median paid, INE (12 months to June 2026)	Asking, idealista (August 2026)	What is there
Cascais centre (town, marina, Guia)	Cascais e Estoril	€5,623/m² (parish)	€7,146/m² (“Cascais” zone)	Flats in older buildings and townhouses; train terminus, about 40 minutes to Cais do Sodré
Quinta da Marinha, Birre, Areia, Guincho	Cascais e Estoril	€5,623/m² (parish)	€7,146/m² (same zone; no separate series)	Detached villas, gated and golf estates, rural edge towards the Sintra-Cascais Natural Park; no train
Estoril, Monte Estoril, São João and São Pedro do Estoril	Cascais e Estoril	€5,623/m² (parish)	€6,813/m² (“Estoril” zone)	Flats and older villas, many with sea views; train stops 32 to 38 minutes from Cais do Sodré
Carcavelos and Parede (the Oeiras edge)	Carcavelos e Parede	€5,071/m²	€5,403/m² (parish); Parede €5,622, Carcavelos Centro €5,727	Denser towns on the train line with more flats; St. Julian’s School is in Carcavelos
Alcabideche (Alcoitão, Alvide, Amoreira, Manique, Murches)	Alcabideche	€4,412/m²	€4,923/m²	Inland, larger plots and newer estates near the A5 and A16; no train
São Domingos de Rana	São Domingos de Rana	€4,068/m²	€4,123/m²	Inland residential areas; St. Dominic’s International School is here
Cascais municipality	All four	€4,889/m²	€6,055/m²

The gap between asking and paid is widest at the top. In Cascais e Estoril parish, idealista’s asking average (€7,020/m²) runs about 25% above the INE median paid; in São Domingos de Rana the gap is about 1%. The two figures cover different periods, so treat the gap as a guide. A 100 m² flat at the Cascais e Estoril median is €562,300; at the parish asking average it is €702,000.

Momentum has moved inland. Over a year to June 2026, INE medians rose 7.5% in Cascais e Estoril (from €5,229), 12.4% in Carcavelos e Parede, 19.8% in Alcabideche and 13.5% in São Domingos de Rana. Asking prices in Cascais e Estoril parish were 1.2% lower in August 2026 than three months earlier. More detail is in selling in Cascais and a free price estimate.

International networks and franchises

Castelhana (a Dils company)

Castelhana is a Lisbon-headquartered agency that describes itself as a Dils company. Its Cascais-area office is at Rua Melo e Sousa 395, R/C loja C, 2765-253 Estoril, open on weekdays and Saturdays. It works in the upper-middle to luxury segment, including new developments. The website is in English, French and Portuguese. Two licensed companies appear in the footer: Castelhana – Sociedade de Mediação Imobiliária, Unipessoal Lda (AMI 3497) and Dils Portugal, Lda (AMI 24280), both verified on IMPIC on 14 October 2026 and registered in Lisbon. The website does not say whether it represents buyers.

Tradeoff: two licensed companies trade under one brand, so confirm which one signs your mediation contract.

Engel & Völkers Cascais

Engel & Völkers Cascais is run by SOPC4 Atividades Imobiliárias, a licence partner of the German group Engel & Völkers Residential GmbH. Its shop is in the lobby of the Onyria Quinta da Marinha Hotel, Rua das Palmeiras, 2750-005 Cascais; the imprint and IMPIC give Rua dos Coelhos 250, Quinta da Marinha. It lists German, Spanish, English, Portuguese, French and Russian. It covers residential, investment and luxury property; listings on 24 September 2026 included flats in Quinta da Marinha and São Pedro do Estoril. AMI 18136, verified on IMPIC on 14 October 2026. Its 2025–26 market report is the source of the widely quoted 81.3% foreign-buyer figure for Cascais.

Tradeoff: each Engel & Völkers shop is a separate company, and other shops also cover Estoril and Carcavelos.

KW Select Cascais (Keller Williams)

KW Select Cascais is a Keller Williams franchise office operated by Yellow Select, Mediação Imobiliária, Lda. The office is at Avenida de Sabóia 859 A in Monte Estoril, between Cascais and Estoril; IMPIC lists the company’s registered seat in Lisbon. It works across all price segments rather than specialising in luxury, and its office page listed 92 consultants on 14 October 2026. The KW Portugal website has an English version; the office does not list the languages its consultants speak, so ask for an English-speaking consultant. AMI 16720, verified on IMPIC on 14 October 2026. The website does not say whether it represents buyers.

Tradeoff: Keller Williams is an agent-led model, so the service you get depends largely on the individual consultant.

Porta da Frente Christie’s

Porta da Frente – Sociedade de Mediação Imobiliária, Lda, licensed since February 2005, is the Christie’s International Real Estate affiliate for Lisbon, Cascais, Oeiras and the Alentejo. The Cascais office is at Avenida Marginal 8648 B, 2750-427 Cascais, which is also its registered seat. It works in the upper and luxury segment, with a large new-development book; on 24 September 2026 it was marketing Juzzo Design Villas in Aldeia de Juzo (from €2,325,000) and Hilton Cascais Residences in Parede (from €595,000). It publishes its own premium-market report, with an English version. AMI 6335, verified on IMPIC on 14 October 2026. The website does not say whether it represents buyers.

Tradeoff: much of its book is developer stock, and its market report is based on asking prices, not sales.

Portugal Sotheby’s International Realty (Cascais and Estoril offices)

The Sotheby’s International Realty brand is run locally by two separate licensed companies. The Cascais office is operated by Cascaisazul – Mediação Imobiliária Lda (AMI 23153), at Edifício Baía Center, Passeio de Dom Luís I 16–17, 2750-474 Cascais; IMPIC registers it at the same address. The Estoril office is operated by Sinalazul – Mediação Imobiliária, Lda (AMI 7744), at Avenida Aida 295A, 2765-187 Estoril. Both numbers were verified on IMPIC on 14 October 2026. Both offices work in the luxury segment. The national website is in Portuguese, English, French and Spanish. Neither office page says whether it represents buyers.

Tradeoff: the two offices are different companies, so your contract is with one licensee, not the brand as a whole.

Quintela + Penalva | Knight Frank

Quintela & Penalva Associados – Sociedade de Mediação Imobiliária, Lda trades as Quintela + Penalva and is the Portuguese associate of the British firm Knight Frank. Its Cascais-area office is at Av. Sabóia 514 A, 2765-277 Estoril, closed at weekends; the registered seat is in Lisbon. It works in the upper and luxury segment and on new developments, and offers a “Private Consulting” service. The website has an English version. AMI 6182, verified on IMPIC on 14 October 2026. The website does not state the languages its team speaks, so ask when you first call, and ask whether the consulting service acts for buyers, sellers or both.

Tradeoff: the Estoril office is closed at weekends, which matters if you plan to visit on a short trip.

RE/MAX Collection Costa do Sol

RE/MAX Collection Costa do Sol is a RE/MAX franchise run by EstorilHouse – Mediação Imobiliária, Lda. The office is at Avenida Aida, Empreendimento Estoril Garden 711, 2765-187 Estoril, which is also the registered seat. “Collection” is the RE/MAX label for its premium segment, so this office concentrates on higher-value homes rather than the whole market. The website is available in Portuguese, English and French. AMI 11128, verified on IMPIC on 14 October 2026. The website does not say whether it represents buyers. The Sotheby’s Estoril office is on the same avenue.

Tradeoff: RE/MAX offices are independently owned franchises, so commission and service vary from office to office.

RE/MAX Collection Team

RE/MAX Collection Team is a separate RE/MAX franchise run by Mentes Positivas – Mediação Imobiliária, Lda. The office is at Av. Manuel Júlio Carvalho e Costa 44A, 2750-423 Cascais, in Cascais town; IMPIC lists the company’s registered seat in Algés, Oeiras. Like the Costa do Sol office it works under the RE/MAX “Collection” premium label. The website is in Portuguese, English and French. AMI 13010, verified on IMPIC on 14 October 2026. The website does not say whether it represents buyers. Your contract is with the franchise company that signs it, not with RE/MAX Portugal.

Tradeoff: it is a franchise office, so terms are set by the office, not by RE/MAX nationally.

The Agency Cascais

The Agency, a US luxury brokerage brand, opened its Cascais office in May 2024, at the same time as one in Vilamoura, according to its own announcement. The Cascais office is on Rua Alexandre Herculano, 2750-284 Cascais, in the town centre. Its Portuguese website shows AMI 21865, which IMPIC registers to SON, Mediação Imobiliária, Lda, with a registered seat in Lisbon, verified on 14 October 2026. The website does not give that company name, so check it on the contract. It markets luxury homes, and its Portuguese listings span Lisbon, Cascais, the Algarve and Porto, including furnished lets in Cascais. The website is in English, Portuguese, French and Spanish. It does not say whether it represents buyers.

Tradeoff: a young office (2024) within a brand whose Portuguese listings span several regions.

Local independents and boutiques

Afinest Luxury Real Estate

Afinest is the trading name of Abreu Faro – Mediação Imobiliária, Lda, a Cascais-based agency working in the luxury segment across Cascais and Estoril. Its office is at Av. Gaspar Corte Real 126 Loja B, Bairro do Rosário, 2750-164 Cascais, close to the Birre and Rosário villa areas; IMPIC registers the company at the same address. The website is in Portuguese, English and French; it does not list the languages its team speaks. AMI 9585, verified on IMPIC on 14 October 2026. The website does not say whether it represents buyers. As a local firm, it concentrates on one stretch of coast rather than a national or international network of offices.

Tradeoff: it is a small team with weekday office hours only.

Inside Living

Inside Living, Lda is an independent agency with its office at Av. da República 3000, Edifício Estoril Office, Bloco B, Piso 1, Esc. 5, 2649-517 Cascais, in Alcoitão. It works in the upper and luxury segment in Cascais and Lisbon and says it covers the whole country. It lists the widest set of languages in this guide: Portuguese, English, Spanish, French, Chinese, Russian, Swedish and German. AMI 8417, verified on IMPIC on 14 October 2026, registered in the same building. The website does not say whether it represents buyers. For sellers, the language range may help when a buyer’s first language is not English.

Tradeoff: the office is in a business park, not a street-front shop, so arrange visits in advance.

Rose Real Estate (RRR)

Rose Real Estate trades through R.R.R. Sociedade de Mediação Imobiliária e Gestão de Imóveis, Lda. The office is at Avenida General Carmona 165 (formerly number 13), 2765-207 Estoril; IMPIC still lists the old number. It describes itself as working for more than 30 years in Estoril, Cascais, Sintra and Lisbon. Unlike most agencies in this list, it handles lettings and property management as well as sales. The website is in English and Portuguese. AMI 6703, verified on IMPIC on 14 October 2026. The website does not say whether it represents buyers.

Tradeoff: its mix of sales, lettings and management may suit owners still deciding whether to sell or let.

Buyer’s agents in Cascais

A buyer’s agent represents only the buyer. Portuguese law bars an agency from being paid by both buyer and seller in the same deal (Lei 15/2013, article 17(2)(a)). Some are paid by the buyer; others say they take a share of the selling agent’s commission. Get the fee in writing. See buyer’s agents in Portugal and our Lisbon buyer’s agents list.

Brint

Brint Portugal describes itself as an exclusive buyer’s agent that “works only for you, never for the seller”, and lists Cascais, Lisbon and Sintra among the areas it covers. The licence holder is Araújo, Barbosa & Santana – Brint Portugal, Lda (AMI 19563, verified on IMPIC on 14 October 2026), registered at Av. Eng. Adelino Amaro da Costa 21, Loja 40, Leiria, the same Portuguese address its website gives. It also uses US phone numbers. The website is in English. It does not list homes for sale and does not publish its fees, so ask for a written fee proposal. It is of use to buyers, not sellers.

Tradeoff: it is based in Leiria and covers the whole country, so ask who handles Cascais viewings in person.

Goldcrest Advisers

Goldcrest is the trading name of Golden Solstice – Lda, a buyer-only agency that says it covers the Lisbon region, including Cascais. Its offices are in Lisbon (Av. 24 de Julho 4), Porto and Lagoa in the Algarve; it has no office in Cascais. The website, portugalbuyersagent.com, says it has advised clients of 32 nationalities. AMI 23310, verified on IMPIC on 14 October 2026, registered at the Lisbon address. The legal company name is not shown on the website, so check it on the contract. Its fees are not published, so ask for a written fee proposal before you instruct it.

Tradeoff: it covers Cascais from its Lisbon office, and its fee model is not published.

Portugal Buyers

Portugal Buyers is the trading name of Henderson Realty, Unipessoal Lda, a buyer’s agency with dedicated Cascais and Estoril pages; its Cascais page is headed “Exclusive Property Buying Service in Cascais” and offers a free initial consultation. It says it covers the country through its own team in Lisbon, Porto and the Algarve and trusted local partners, and runs a luxury buyer service. AMI 26180, verified on IMPIC on 14 October 2026, registered at Rua Vale Telheiro, 8100-318 Loulé, in the Algarve. The website is in English. It gives no Cascais office address and refers to a “unique fee structure” without publishing figures, so ask for a written proposal.

Tradeoff: the licence is registered in the Algarve and no Cascais address is published, so ask who will run your search.

Other firms active in Cascais

Other firms working in Cascais that we haven’t profiled yet include BARNES Cascais (Praça Dr. Francisco Sá Carneiro 1), Fine & Country Cascais & Estoril (IRG International Realty, Lda, Avenida Aida, Estoril) and the buyer’s agent Kuabit Realty. On 14 October 2026 none of their websites showed an AMI number for the Cascais business; we’ll add them once we’ve confirmed it. You can check any agency’s licence yourself on the IMPIC website. Savills and JLL don’t have a Cascais office. Selling in Carcavelos or Oeiras? See the Oeiras and Carcavelos agents list.

What does selling cost on a €750,000 apartment or a €2m villa?

The seller pays the agent; the buyer pays IMT (property transfer tax), stamp duty and the deed. Commission is worked at 5% plus 23% VAT.

Cost the seller pays	€750,000 Estoril apartment	€2,000,000 Quinta da Marinha villa	Basis
Commission at 5%	€37,500	€100,000	Negotiable; typical range about 3–6%
VAT on commission at 23%	€8,625	€23,000	Charged on the agent’s fee
Commission including VAT	€46,125	€123,000	Paid at the deed
Each point of commission, with VAT	€9,225	€24,600	1% × price × 1.23
Energy certificate	about €150–350	about €150–350	Typical, depends on size; required before advertising
Early repayment fee on €200,000 still owed	€1,000 (variable) or €4,000 (fixed)	€1,000 or €4,000	0.5% or 2% caps, Decree-Law 74-A/2017, only if the loan contract provides
IMT, stamp duty, deed and registration	€0	€0	Paid by the buyer

Commission and its VAT are deductible from your capital gain if the invoice carries your tax number (NIF). Since 1 January 2023 a non-resident seller is taxed on 50% of the gain at progressive rates of 12.5% to 48%; the old flat 28% rate no longer applies. Run your figures in the selling calculator and see costs of selling.

The buyer’s tax affects your buyer pool. Since 25 May 2026 a buyer who is not tax resident in Portugal pays IMT at a flat 7.5% of the price of a home (Decree-Law 97/2026). On the €750,000 apartment that is €56,250, against €45,000 for a resident buying it as a main or second home (the 6% flat band applies at that price), so €11,250 more. On the €2m villa everyone pays 7.5%, €150,000, because the ordinary table already charges 7.5% above €1,150,853. Both buyers also pay 0.8% stamp duty (€6,000 and €16,000). The non-resident premium therefore applies only below €1,150,853, which in Cascais covers most flats. A buyer who becomes resident within two years can reclaim the difference. See the IMT calculator.

For sellers who live abroad

• Language on paper, not only in person. Ask for the mediation contract in Portuguese with an English translation. Engel & Völkers Cascais lists six languages and Inside Living eight; the others state only their website languages.
• Remote signing. You can sign the CPCV (promissory contract) and the deed through a power of attorney (procuração), notarised and apostilled if signed outside Portugal. Ask whether the agency has handled sales where the owner never came to Portugal.

The full process is in selling as a non-resident.

How to choose an agent to sell in Cascais

• Check the licence. Every agency must hold an AMI licence from IMPIC and show the number on contracts and adverts. The number on your contract must belong to the company that signs it; several brands here trade under a different company name.
• Ask for sold prices. idealista asking prices (€6,055/m² for the municipality, August 2026) sit well above the INE median actually paid (€5,200/m² in the second quarter of 2026; €4,889/m² over the 12 months to June 2026). Ask for completed sales in your own street or estate.
• Negotiate commission in euros. Use the cost table above, and see estate agent commission.
• Keep exclusivity short. The contract must state duration and commission (Lei 15/2013, article 16); with no stated duration it lasts six months. Under exclusivity, commission is owed if the sale fails through your fault (article 19(2)); simple exclusivity does not stop you selling to a buyer you found yourself (Supreme Court, 12 April 2023).

See also selling in Cascais, buying in Cascais and the Cascais & Estoril hub.

Key points

• There is no official ranking of estate agents in Cascais or Estoril. This list covers 13 agency offices and 3 buyer’s agents, grouped by type and alphabetical, not ranked, each with an AMI licence re-checked on IMPIC on 14 October 2026.
• The best fit depends on the property: luxury networks and boutiques for Quinta da Marinha and Birre villas, Estoril offices for Estoril flats, all-segment offices for Parede and inland homes, buyer-only firms if you are buying.
• Cascais e Estoril parish: median €5,623/m² paid (INE, 12 months to June 2026) against €7,020/m² asking (idealista, August 2026); inland Alcabideche and São Domingos de Rana are cheaper and rising faster.
• Commission of 5% plus VAT is €46,125 on a €750,000 apartment and €123,000 on a €2m villa; each point is worth €9,225 or €24,600.
• A non-resident buyer pays €11,250 more IMT on a €750,000 home, and the same as a resident above €1,150,853.
• The 81.3% foreign-buyer figure often quoted for Cascais comes from Engel & Völkers’ own report, not an official statistic.