Usually you write and offer and then the seller will have to counter or accept. The process can take an hour to a couple weeks depending on the buyer's and seller's response time and how many counter offers go back and forth. If the property is a short sale the bank will have to also approve the price. This can take a month-6 months to go through.
Good luck with your purchase and if you have any questions, just let me know.
The Carrabba Group
Keller Williams Hollywood Hills
If you are purchasing a home from an actual seller, it can be very quick. If you are buying a foreclosure from a bank or investor, it can take up to 2 weeks; and if you are purchasing a short sale, it can take up to 3-4 months to get full approval from the bank. In that case, it doesn't matter when the homeowner accepts it, the offer must be ratified by the bank/investor.
Hope this helps!
Lancaster, Ca 93534