PTCL WIFI Range booster

i have ptcl 4 mb connection alnog with wifi router... i want to share this connection to y office ... distance is 550 meter from my house... how can i boost my wifi router singal...

Use a high gain directional antenna.

Use long range wireless access points. Unless you have more transmitted power, adding antennas will not prove much success.

If you are in RWP/Islamabad, there is a company in blue area dealing with high power/long range wireless networking.