If you are evaluating which southern NH city/town to relocate to and tax rates are important to you, here are a few tax rates for your reference;
Atkinson - $18.30
Chester - $23.41
Danville - $28.25
Derry - $27.06
Hampstead - $24.64
Londonderry - $21.61
Plaistow - $22.50
Rye - $10.11
Salem - $20.84
Sandown - $30.78
Seabrook - $16.25
Windham - $20.20
For other towns and/or a break down of the tax rate, view; (go to "2017", "Completed Tax Rates) https://www.revenue.nh.gov/mun-prop/municipal/documents/16-final-rates.pdf
https://www.revenue.nh.gov/mun-prop/municipal/property-tax-rates.htm
Information believed to be accurate however not guaranteed.