Consolidating muliple parcels into single development

[Dave M.]

In my neighborhood, there is substantial demand for adjoining parcels that are consolidated to re-purpose for either single or multi family redevelopment. Is there anyone who has a suggestion for valuing adjoining properties?

My situation is this. I own one property. How should I value the acquisition of the first adjacent property? The second?

Also, since there are two independent sellers, how should I build this into my plan?