Hello Samir and thanks for your question.
Let me see if I can help you.
If you live in a condominium, the only areas that you actually own are the interior air spaces bounded by the perimeter walls of your unit. As a result, anything past the paint on the walls belongs to the homeowners association. Although the leak began outside of your home, as the homeowner, you do have the responsibilty to contact the insurance company for the homeowners association about the leak. Do that tomorrow and file a claim.
If you were not already told this, you--as the homeowner--should also carry homeowners insurance in addition to the insurance carried by the homeowners association. This is important because, as you will soon find out, there are exclusions in the Association's policy that will prevent them from covering any losses to your furniture or personal items damaged by the water. The Association's insurance will take care of the water damage to the carpet, the walls, and other parts of the bedroom and living rooms, but the contents in those roooms that are personal contents are, in most cases, not covered. Further, there will be a deductible that must be paid--$5000 per occurrence seems to be the "going rate" for insurance policies these days--so expect that you may have to force the developer to pay for the deductible associated with your claim.
Finally regarding the issue of who should handle the repairs, if this is the first 12 months that you've owned the home, your developer/builder should have given to you a one year warranty on all parts of your home. This same warranty is extended by the developer to the homeowners association for all components of "common area" (the structure and pipes in the wall). The Association Manager will know whether or not this warranty is in place and can be used by the Association to cover the $5000 deductible and/or the cost of repairing the pipe. If the developer is at fault and there is coverage under a warranty, most likely, the insurance company will subrogate to the developer for all repairs (in other words, will ultimately make the developer pay for damages).
So, my advice, take lots of pictures. Document all damages. Call the insurance company and schedule a claims adjuster right away.
Grace Morioka, SRES, e-Pro
Common Interest Development Expert
Area Pro Realty
Co-Author: "Homeowners Associations: A Guide to Leadership"