Often the new homes sales representative has the ability to calculate this future value for you. Keep in mind if this will be your homestead than the homestead exemption will apply.
Some new home communities also carry a community development district tax which is usually paid with your property taxes.
Realtors save buyers money when buying a new home. Having worked with many new home buyers, there are incentives and questions that I have procured for my clients at the time of contract.
Brock Realty Inc.
If you don't have a Realtor at your side protecting you then you need to get everthing "in writing" from the builder's salesperson. Ask him/her for a written breakdown of what your expected taxes are.
Many new communities pay exhorbitant "extra" taxes in the form of Community Development District Taxes. I hope you were well aware of the significant expense (that can last for 30 years in many CDDs) before you signed your builder contract.
Also you absolutely should pay for a multistage home inspection. This will ensure the builder's project manager does everything correctly because they know they will have a contractor overseeing the work. You cannot expect the county building inspector to catch even significant defects.
I have personally been involved with 3 homes where the builder made significant errors with the structure and it could have been catostrophic. In one case I assisted a seller and fortunately the property was 9 years old when they decided to sell because the whole support system in the attic was installed incorrectly. It fell within the 10 year structural warranty so the $40k repair job didn't cost the Seller. The roof could have collapsed under high winds, though and could have resulted in serious injury to the family living in that substandard house!
All the best,
Franches Schnell, REALTOR
Future Home Realty