शान्‍तिपूर्णम् गृहम् = a house with full of peace
शान्‍तियुक्तम् गृहम् = a house having peace in it.

If you want to write it outside your home, it's better to write

शान्‍ति: शान्‍ति: शान्‍ति:!

A three time chanting of the word 'shanti' alongwith 'Om' is really peace giving to all family members living in home.

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Note added at 8 days (2010-03-12 04:56:07 GMT)
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Aman may mean 'peace', but it's not in Sanskrit. It is used in Hindi and Urdu. I am not sure of 'oka'. It is not a Sanskrit word or does not seem to be a Sanskrit suffix even.

Rest, you may be please contact me and let me know the charges you are willing to pay for the naming task. I will think about it and give you some worthwhile and attractive options, if I will feel charges compatible to my efforts.

For a real estate company, you may please forward me the place, where you are opening this company and planning time of the company and types of accomodations, estates, you will be dealing in, like say residential, apartments, official spaces etc.

I hope, I can help you in this regard. You can find my contact details in my proz profile. Thanks in advance!