Other than your rent you should expect to pay the following property / residential related costs.
Gas: If your building has piped gas (most modern buildings). Depends on the amount you cook / water heaters etc. Not really variable by location.
http://www.geoexpat.com/Hong_Kong/Ut.../Town_Gas_L471
Some locations have piped LPG gas and are serviced by agents of Shell. Check with the management company of the building you're interested in.
http://www.geoexpat.com/Hong_Kong/Ut...Shell_Gas_L472
Estimate about HK$100-350.
Electricity: Two major electricity distribution companies in Hong Kong.
Hong Kong Electric Company (HK + Lamma Island)
http://www.geoexpat.com/Hong_Kong/Ut...c_Company_L473
and
China Light and Power :
http://www.geoexpat.com/Hong_Kong/Ut...and_Power_L474
Estimate about 25 cents per sq foot. The cost is variable on usage and not location. Some older buildings / apartments have highly inefficient air conditioners and appliances which could end up costing more to run than to purchase new ones.
Phone: Most people usually go with PCCW / Hong Kong Telecom. Around HK$70-100 / phone line depending on services like Voice mail etc. Cheaper to buy your instrument than to rent one. Factor in another HK$250 to 500 for broadband internet, which you can get installed from several ISPs.
http://www.geoexpat.com/Hong_Kong/Ut...g_Telecom_L475 Repairs: We have several handymen listed in our directory. Most major repairs are the responsibility of your landlord -- make sure you contract includes this.
Water: The water supplies department of Hong Kong Govt is responsible for water supplies. The cost varies depending on your usage.
http://www.geoexpat.com/Hong_Kong/Ut...epartment_L476
Estimate about HK$30-50 per month
Other major costs would include govt rates and management fees. It is common to have these included in your rental package with the landlord.
Make sure you check this wonderful guide to renting in Hong Kong.
http://www.geoexpat.com/resources/Detailed/432.html