A　global　concern　for　a　transition　to　a　sustainable　construction　approach　is　imminent　and　highly　important.　This　research　aims　to　identify　a　justifiable　strategy　to　improve　sustainable　construction　success.　To　enhance　the　success　rate　of　sustainability,　important　factors　contributing　to　the　cause　such　as　project　management,　integrated　approaches,　and　modern　methods　of　construction　(MMC)　are　studied.　The　core　ideology　is　to　understand　the　relational　attributes　of　these　factors,　their　significance,　and　the　mediating　effect　of　modern　methods　of　construction　(MMC)　in　sustainable　project　success.　A　deductive　research　approach　is　undertaken,　by　performing　a　web-based　self-administered　quantitative　questionnaire　survey　with　5-point　Likert　scale.　The　survey　adopts　the　snowball　purposive　sampling　technique　to　collect　data　from　construction　professionals　like　project　managers,　architects,　contractors,　researchers,　etc.　The　survey　recorded　a　total　of　149　responses,　majorly　from　the　UK,　forming　the　base　for　several　statistical　data　analysis　techniques,　supporting　the　formulation　of　research　findings.　Structural　equation　modeling　is　the　cardinal　analysis　approach　carried　out　to　draw　relational　values　between　the　principal　research　factors.　The　findings　of　the　research　highlight　that　both　project　management　and　integrated　approaches　display　a　significant　positive　relationship　with　sustainable　construction　project　success.　It　is　observed　that　project　management　and　integrated　approaches　have　positive　impact　on　sustainable　construction　success　with　R　=　0.208　and　R　=　0.569　respectively,　at　a　significance　value　＜0.05.　Moreover,　incorporating　modern　methods　of　construction　as　the　mediating　factor　further　enhances　the　project　success　rate.　Thus,　it　can　be　depicted　that　in　order　to　gain　a　maximum　output　from　project　management　and　integrated　approaches　to　build　the　sustainable　construction　the　role　of　modern　methods　of　construction　is　critical.　The　research　will　help　to　bridge　the　gap　between　available　extensive　knowledge　on　sustainable　construction　and　scant　information　on　its　successful　implementation.　©　2023,　Korean　Society　of　Civil　Engineers.