Mars in the 11th house (Labha, the house of gains) brings the significations of Mars, namely energy & courage, younger siblings, land & property, into the area of gains, income, friendships and fulfilled desires. The 11th house governs gains & income, friends & networks, elder siblings, fulfilment of desires.
Results of Mars in the 11th House
Mars is a malefic planet, so here it tends to bring anger, impulsiveness, accidents, conflict and disputes over property focused on gains, income, friendships and fulfilled desires.The exact result depends on which sign Mars occupies here and the aspects it receives.
When It Activates
These results typically surface during the Vimshottari mahadasha or antardasha of Mars, and when transiting planets trigger the 11th house. A well-placed Mars here supports strong income, valuable friends and the fulfilment of ambitions; when afflicted it can indicate blocked gains, unreliable friends and unmet desires.