Twarda 7. Warsaw's narrowest city-centre tower seeks an investor

In the very heart of Warsaw, on one of the smallest plots in Śródmieście, the 105-metre Twarda 7 tower is set to rise. It is an unusual project in every respect — from its slender form shaped like the number seven, through its mixed-use programme, to the delivery model itself. The scheme already has a building permit and has been seeking an investor since December 2025.

Who is behind the scheme

It is worth clearing up any doubts about the developer straight away. The investor is Grupa Antczak, a construction firm from Kalisz led by Marcin Antczak. It was Grupa Antczak that obtained the building permit and owns the plot, described as one of a kind in the city centre. Securing the permit was preceded, as the investor stresses, by a difficult, multi-year process requiring close cooperation with city authorities and the owners of neighbouring properties.

In December 2025 the developer put the project up for sale. 'We are stepping up efforts to bring in partners for the further delivery of Twarda 7,' says Marcin Antczak, the group's CEO. The process is being run by advisory firm Walter Herz, whose partner Emil Domeracki notes that bids are being coordinated 'under a clearly defined procedure', with a full set of materials and project assumptions available in the memorandum. 'On behalf of the investor, we are currently negotiating with parties interested in taking this project further,' he adds.

A flexible deal structure

The exit model is unusually open. Grupa Antczak is entertaining several options: selling the roughly 416 sq m plot together with the building permit, staying on as an investment partner, or delivering the scheme itself as general contractor — an area in which the company has extensive experience. Disused garages earmarked for demolition still stand on the plot today; no precise works schedule has been set, though the developer maintains that the full costing of the scheme has already been worked out in detail. The offer is aimed at both institutional and private investors — a good reflection of the growing appetite of Polish capital for real estate in 2025. Market reports suggest interest has been considerable: several proposals have come in, and the advisor has begun drawing up a shortlist of candidates for further talks.

A place in Warsaw's skyline

The location places Twarda 7 in select company — and that company explains much of the interest in the project. Two landmark schemes for the capital stand right next door: Złota 44, priced at roughly PLN 58,000 to 125,000 per square metre (averaging around PLN 63,000), and Cosmopolitan, capped at PLN 50,000–60,000 per square metre. Both towers are already sold out and occupied, with prices there up by more than a quarter over the past few years. The wider luxury market is filled out by further addresses: Noho One, Apartamenty Gutenberga within the Towarowa 22 scheme, Dom Development's Grzybowska 11, Archicom's Flare, and the boutique Chłodna 35 by Monting, offering a spa, concierge and smart-home features. This concentration of premium schemes confirms the scale of demand for luxury apartments around Daszyński roundabout.

A narrow group of towers with a permit

Twarda 7 thus joins a very narrow group of Warsaw towers that secured a final building permit in 2025. The only other scheme this advanced is the far larger Roma Tower — 48 storeys and roughly 170–180 metres tall, with construction due to start in 2026. Against that backdrop, Twarda 7 stands out not for its scale but for its slenderness and structural difficulty: a project that became the subject of market manoeuvring before the first spade even went into the ground. If it finds an investor, central Warsaw will gain one of the most distinctive, and structurally most demanding, addresses of recent years.