If central Barcelona feels cramped and old, Diagonal Mar is the antidote: wide pavements, glass towers, a big park, the sea a few minutes away and flats with lifts, pools and parking — things you simply cannot take for granted in the old town. The catch is that it can also feel a bit like a resort that happens to be a neighbourhood. Whether that trade is worth it depends entirely on the life you are trying to build.
This is the eastern waterfront of the Sant Martí district, and it comes in two layers that people often lump together. Vila Olímpica is the older one: the athletes' village and marina built for the 1992 Olympics, now a dense strip of apartments, the two landmark towers (Torre Mapfre and the Hotel Arts), Port Olímpic and the beaches of Nova Icària. Diagonal Mar is the newer layer, built from the late 1990s on former industrial land near the 2004 Fòrum site, and it is where the genuinely modern housing sits.
The spine of the newer part is the Parc de Diagonal Mar, the largest park in Barcelona, designed by Enric Miralles and Benedetta Tagliabue and full of water features, lawns and wandering paths. Beside it: the Diagonal Mar Centre shopping mall, the Museu Blau natural science museum in the Fòrum forum building, and the rambla de Prim running back towards Poblenou. Metro L4 has you covered at El Maresme | Fòrum and Selva de Mar, with the Tram T4 and the C-31 / Ronda Litoral for drivers.
The beach here is seriously good and, unlike Barceloneta, rarely heaving. Platja de Nova Mar Bella and Platja de Llevant are wide, clean and backed by the Fòrum esplanade; locals swim before work and walk the seafront at sunset. The park does the heavy lifting for families — playgrounds, fountains and enough space to actually tire a child out. Weekly life is easy: the mall and the Rambla del Poblenou a short walk away cover shopping and decent casual food.
What you will not get is much of a "village". Avenues are wide and the buildings are tall, so the streets can feel empty and a little impersonal, especially on the 22@ side. That is the honest cost of the space and the light. For some people it is exactly what they want after years in a narrow old-town flat; for others it drains the charm within a month.
Diagonal Mar is not cheap — you are paying for new build, size and the sea. Prices for 2026 run around €21 per square metre for flats, and the market is wide because the stock is. Rough orientation:
Because so much of the stock is purpose-built and uniform, two-bedroom flats in the same block can differ a lot in price depending on floor, orientation and whether parking and a pool come with it. Always ask what is included: in these buildings the parking space alone can be worth a couple of hundred euros a month.
You are better connected than the location on the map suggests. Metro L4 at El Maresme | Fòrum and Selva de Mar gets you into the centre in about twenty minutes, and the Tram T4 runs the waterfront towards Glòries and beyond. By car it is one of the easiest parts of the city to leave — the Ronda Litoral and C-31 are right there, which is a real plus if you commute up the Maresme coast or drive to the airport often. On foot, Poblenou is a fifteen-minute walk and the beach is closer still.
For families this is one of the more practical parts of Barcelona. Newer buildings mean lifts, insulation, garages and often a communal pool — the everyday logistics of children get a lot easier. The park and the calm beaches are right there, and the flats are big enough to actually live in rather than squeeze into. The main drawback is schools: the international schools are mostly in the Zona Alta or up the Maresme coast, so a school run by car or train becomes part of the routine.
One more thing worth saying: Diagonal Mar and Vila Olímpica are not the same neighbourhood, even if agents blur them. Vila Olímpica is more central, busier and closer to the classic city; Diagonal Mar is calmer, newer and more self-contained. If you want to be able to walk to dinner in the old town, lean Vila Olímpica. If you want a big modern flat, a pool and quiet, lean Diagonal Mar.
It fits families who want space and newer housing near the sea, professionals who commute out of the city by car or up the coast, and anyone who simply prefers modern buildings to historic charm. It is a strong landing point if you are moving to Barcelona and want a comfortable, low-friction first home while you explore the city properly.
It frustrates people who want the medieval, walk-out-and-everything-is-there feel, and anyone who finds wide empty avenues and tall buildings a bit soulless. There is no pretending it is charming. It is comfortable, connected and bright — and for a lot of households that is the trade they will happily make.