You haven't mentioned if your 1.8 L p.a. INCLUDES incentives, since incentives are usually high in the real estate domain. With due respect to Yogaraj & Ashish, I am not sure asking for any sort of hike IN YOUR PRESENT COMPANY is going to work. Let's be realistic—no company will agree to such a level of hikes, especially your company, going by what you mentioned [if they indeed value effort, you would have got your hike long ago WITHOUT asking].
And let's look at it from another point of view. Why didn't you get any hike so far? Any company gives some sort of hikes—especially to marketing people, since they are the ones who bring in the revenue. Was your performance below par? Some pockets in India aren't doing well in the real estate sector—are you located in any of them?
If, after self-analysis, you are convinced that you have DONE YOUR BEST on the job AND got the best results, and yet didn't get the reasonable salary hikes, then I can see only one option—CHANGE YOUR JOB. The chances of getting higher hikes are usually high when one changes the job, compared to what one gets within the same organization.
All the Best.
Regards,
TS