Nou Barris · 53
la Trinitat Nova
La Trinitat Nova is a neighbourhood built twice: first from 1953 to 1963 as rapid public housing for a growing city, then from the late 1990s through renewal that replaced defective blocks and tried to retain community through years of moves, demolition and construction.
Near the metro, find an old block, a replacement building and open ground created by demolition in one view. Differences in façade, orientation, lifts and distance from the street form a built chronology. Renewal here is not a before-and-after image but a life lived between phases.
The estate was constructed from 1953 to 1963 by several public promoters and building systems to house working people arriving in Barcelona. Speed, small flats, missing facilities and material defects marked its first phase.
When aluminosis and other failures emerged, simple refurbishment was insufficient. The renewal plan approved in 1997 replaced dozens of blocks and rehoused residents nearby. It matters both as architecture and as a case of community participation, including participation’s limits.
la Trinitat Nova (neighbourhood 53) highlighted. Other neighbourhoods in Nou Barris: Vilapicina i la Torre Llobeta, Porta, el Turó de la Peira, Can Peguera, la Guineueta, Verdun.
la Trinitat Nova (neighbourhood 53) highlighted. Other neighbourhoods in Nou Barris: Vilapicina i la Torre Llobeta, Porta, el Turó de la Peira, Can Peguera, la Guineueta, Verdun.
Where the name comes from
Trinitat Nova is relational. It distinguishes the new estate from Trinitat Vella, across Avinguda Meridiana and now in Sant Andreu district. Trinitat refers to the older devotion and place; Nova described recent development, not permanent newness. Newness ages too.
Toward Roquetes, Torre Baró, and municipal edges; pair with Trinitat Vella in Sant Andreu.
Before the neighbourhood
Before the estate were peripheral lands among slopes, paths, torrents and water infrastructure. Casa de l’Aigua and the Montcada supply reservoirs show that this edge served metropolitan functions before mass housing. Map precisely which components lie in Trinitat Nova and which in Trinitat Vella.
How the streets were made
The first Trinitat Nova used repetitive blocks imperfectly fitted to topography and under-equipped open space. The second introduced different alignments, accessible homes, squares and continuities. Coexisting phases show the shift from producing quantity to managing pathology, rehousing and cohesion.
Dates that changed it
- 1953–1963: construction of the residential estate.
- 1970s: campaigns for services and participation in the Nine Neighbourhoods association.
- 1997: renewal plan approved in response to building defects including aluminosis.
- 1999: community process and participatory renewal begin; L4 arrives.
- 2000–2001: first replacement housing starts.
- 2003: L11 arrives.
- 2008: L3 arrives.
- Twenty-first century: successive demolition, rehousing and public-space phases.
People and collective life
Families who had lived for decades in defective blocks became experts in calendars, compensation, keys, moves and guarantees. AVV, Pla Comunitari, social workers and technical teams created mediation spaces. Women and older residents often sustained the everyday networks making each move possible.
People behind the buildings
The first architecture bears the mark of housing agencies, contractors and economical or experimental systems. The second also has architects, but depends on rehousing teams, property staff, mediators, works crews and residents. A replacement building is not only a new object; it is a social contract with people losing the old one.
Institutions
A three-line metro node —L3, L4 and L11— is exceptional for a peripheral neighbourhood. Schools, social services, community facilities, local retail and new open space complete the network. Casa de l’Aigua is shared heritage with Trinitat Vella and must be mapped without administrative appropriation.
Social housing agencies
Renewal governance
Struggles that left a mark
Demand: The main struggle was for safe housing without dissolving community. That required nearby rehousing, planning participation, facilities and resistance to stigma. Renewal is an important public victory, but ‘participatory’ does not mean every decision, pace or outcome was agreed.
Outcome: Major public intervention
Keep community through works
Demand: Participation
Outcome: Mixed success
What can still be seen
Blocks from different generations, plots left by demolished buildings, new squares, level changes and the metro node remain visible. Compare windows, balconies, entrances and orientation. Distance between old and new blocks reveals changes in habitability standards and the idea of a street.
Name pair Nova/Vella
Administrative twinning
What disappeared
Many of the 43 blocks affected by renewal disappeared, together with domestic interiors, routes and landing-based neighbour relations. Material memory of early builders also vanished. Necessary demolition produces amnesia if the site shows only new architecture.
The neighbourhood today
In 2026 la Trinitat Nova had 8,128 residents, a density of 140.9 people per hectare, a €15,295 mean census-section income in 2023, 57.7 hectares, and 26% non-Spanish nationality.
Infrastructure and open space lower the average density, while many blocks still concentrate significant social and energy needs.
Non-Spanish nationality (2026): 26%
What is changing
Post-renewal management matters as much as construction: maintenance, communities, premises, open space and integration of new residents. Museum interpretation, facilities and housing phases each have their own status, budget and expected date. An approved plan is not an open facility.
What the guides leave out
Guides present aluminosis, metro and ‘sustainable renewal’ as a closed success story. They omit fatigue from decades of phases, loss of interiors and networks, mediation labour and the fact that a community cannot be moved mechanically with keys.
Twin Trinitats
Boundary between districts cuts a name
Read it on foot
Start: Trinitat Nova (L3/L4/L11) · End: Renewal streets
Walking (excluding stop time): 12 min · 930 m · Estimated visit (with stops): 47 min
The geometry follows the pedestrian network between the three marked points, but it has not been verified as step-free. Check access conditions, works and opening hours before setting out. The approach from public transport is not included in the stated distance.
la Trinitat Nova (neighbourhood 53) highlighted. Other neighbourhoods in Nou Barris: Vilapicina i la Torre Llobeta, Porta, el Turó de la Peira, Can Peguera, la Guineueta, Verdun.
la Trinitat Nova (neighbourhood 53) highlighted. Other neighbourhoods in Nou Barris: Vilapicina i la Torre Llobeta, Porta, el Turó de la Peira, Can Peguera, la Guineueta, Verdun.
Sources for this page
Dates, figures and historical claims are linked to the records used for this page.
- [1] Ajuntament de Barcelona — Open Data BCN (2026-01-01). Padró municipal d'habitants (pad_mdbas) — població per barri. Type: statistical_dataset. Locator: pad-sexe-2026. Accessed: 2026-07-17.
- [2] Ajuntament de Barcelona — Open Data BCN (2021). Densitat de població per barri. Type: statistical_dataset. Locator: densitat-2021. Accessed: 2026-07-17.
- [3] Ajuntament de Barcelona — Open Data BCN (2023). Renda disponible de les llars per persona. Seccions censals. Type: statistical_dataset. Locator: renda-2023. Accessed: 2026-07-17.
- [4] Ajuntament de Barcelona — Open Data BCN (2026-01-01). Població per nacionalitat i sexe. Barris. Type: statistical_dataset. Locator: pad-nac-2026. Accessed: 2026-07-17.
- [5] Joan Busquets (2005). Barcelona: the urban evolution of a compact city. Type: book. Locator: busquets-barcelona. Accessed: 2026-07-17.
- [6] MUHBA / Ajuntament de Barcelona (n.d.). MUHBA — Museu d'Història de Barcelona (publicacions i jaciments). Type: museum. Locator: muhba. Accessed: 2026-07-17.
- [7] AHCB / Ajuntament de Barcelona (n.d.). Arxiu Històric de la Ciutat de Barcelona — fons i cartografia. Type: archive. Locator: ahcb. Accessed: 2026-07-17.
- [8] Ajuntament de Barcelona (n.d.). Catàleg de patrimoni arquitectònic de Barcelona. Type: heritage_catalogue. Locator: heritage-catalog. Accessed: 2026-07-17.
- [9] FAVB (n.d.). Federació d'Associacions de Veïns i Veïnes de Barcelona. Type: civil_society. Locator: favb. Accessed: 2026-07-17.
- [10] AMCB / Ajuntament de Barcelona (n.d.). Arxiu Municipal Contemporani de Barcelona. Type: archive. Locator: amcb. Accessed: 2026-07-17.
- [11] Ajuntament de Barcelona (n.d.). Nomenclàtor dels carrers de Barcelona. Type: gazetteer. Locator: nomenclator-bcn. Accessed: 2026-07-17.
- [12] TMB (n.d.). Transports Metropolitans de Barcelona — xarxa de metro. Type: transport. Locator: tmb. Accessed: 2026-07-17.
Last reviewed: 17 July 2026 · 12 sources consulted