Ok, what state are you in? Laws vary. First, see if the state allows non-judicial condemnation. Often a panel of homeowners will hear the case and make an award. The state will present an ‘estimate of value ‘ which may or may not be based on an appraiser. You will need an appraisal to see if the value offered is reasonable. There will be the value of the taking as well as damages to the remainder ( road proximity, impact and n resale value). If the state is judicial, you may need an attorney.
Go on line to the Appraisal Institute and search for a designated appraiser who is knowledgeable about eminent domain, pay for a consultation.
Good luck
Thanks. We’re in PA. It is the state that is taking the land - I don’t know if that counts as judicial but I expect it is since at some point in the process it had to have been legislated and supported by the judiciary. There are six neighbors impacted directly by this. The state will pay $4000 per property for legal representation, so I’m trying to get the neighbors together and get a single attorney. We can probably get a good one for $24k without any out of pocket expense. I’m actually lucky - I have one neighbor who will lose an inground pool! Thanks for your response.