Hi, Jane. Some of your situation will depend on local regulations (as always), but I would think you could handle this scenario by subdividing the 2 acres off as a building site but your son still keeps the land in his name. In other words, there likely is no need to transfer the property to you at all (unless you just wanted to do it that way). If he keeps title you also may avoid incurring unnecessary taxes, transfer fees and other transaction costs. Check with a local real estate attorney, and good luck!
As for pricing, your suggestion of $20,000 x 98 seems high for a sliver of road frontage to add a turn lane. Granted, you have the right to try to sell your property for whatever you think it is worth (unless it is a government taking for market value, or if you just don’t own the property in the first place), but that does not mean someone will buy it if it is overpriced. The developer likely has other options. Usually valuations in a situation like this are based on an appraised (or negotiated) value per acre or square foot, and then a survey determines the precise size of the sliver of land that is being conveyed at that rate.
It is not unknown for restrictive covenants to ban, for example, the keeping of dogs at a property, though the more restrictive covenants you put on a plot, the more they affects the price you will receive. As a rule of thumb, developers expect to pay one third of the value of the finished development for the plot. So, if a £150,000 house can be squeezed into your back garden, you should think in terms of receiving £50,000.
I agree with Ellen Chung, finding the right type of buyer to target is very important. Also, you should consider the amount of time you have to sell the land. If you are short on time due to back taxes owed or other financial obligations, your best bet may be to talk to a vacant land investor. You will not get the full market price for your property, but the typically can pay cash and close quickly.
Even though you hope to sell that land fast or to sell that land online you will still want to ensure that you have a sign or two made and placed in a prominent spot on the land in question. This way anyone driving past the land will be able to see that the property is for sale and can get a hold of you in the easiest way possible. This especially true when you want to sell land by owner as you may not have to ability to reach as many potential buyers as a property listed in the Real Estate databases, you need to in effect create your own marketing and having a sign will help to advertise when you want to sell land fast.
After identifying your likely buyers, try to think like them so you can focus your message to convey what they need to know about your property. Have information ready about schools, shopping and other nearby amenities. For developable land you can be prepared with zoning information and insight from local authorities about the location and capacity of water and sewer service. Each property is different, so customize your information for your situation and your targeted buyers.