note for documented the fixing of overlapping landuse and determine if outline and building name is correct or not :

Project "Les Sources" is conducted by https://www.belgianland.be/
Initial permit : https://openpermits.brussels/fr/_07/PFD/629625 include the all perimeter.
The permit generate "town planning charge" and made the aquisition by SLRB/BGHM of this building way/967236084 : https://slrb-bghm.brussels/fr/communiques-presse/130-logements-sociaux-de-3-projets-cle-sur-porte-acquis-par-la-slrb

After reception phases the building is operated by the SISP/OVM's (emphyteusis or transfert to the patrimony)

So for this social building "Life Style" i only find one reference : https://www.lessources-brussels.be/fr in the galery ; between garden et aerial ... https://comensia.be/index.php/a-propos/notre-patrimoine/ (fourth picture) name this "Les sources" and i don't find any indication another name.

For the south outline ; this part is still on instruction : https://openpermits.brussels/fr/_07/PU/1697761 and it's a greenfield today.

livingstreet : https://www.mapillary.com/app/?pKey=155131087147194
https://www.mapillary.com/app/?pKey=477595893991165

fr : parc Neerveld (without "de")
nl : Neerveldpark
+ check outline : https://www.woluwe1200.be/le-parc-neerveld/
https://www.woluwe1200.be/la-gestion-des-arbres-de-voirie-parcs-et-zones-vertes/

Martinus V-tuin in nl : https://monument.heritage.brussels/nl/streets/12000224

Does this park has realy a addr:street ?

way/801028960

Is there realy a park yet here ? Aerial show a construction zone, and the only mapillary we have too : https://www.mapillary.com/app/?pKey=848095836103888

For the name i just found this official reference : (p109) https://etterbeek.brussels/sites/default/files/publications/registre/2021-12/20201019_minutes_public_registre_cc.pdf
And text is ambigus to know if the "Commission Royale de Toponymie et de Dialectologie" as been consulted for the park name or not.