Based on Keene’s current rent comps, the two-unit property at 51 Beech St could generate a combined monthly rent between $1,490 and $2,500 per unit, depending on updates and finish level. That means total gross monthly revenue ranges from $2,980 to $5,000, or $35.8K to $60K annually. At a $249K list price, the gross rent multiplier (GRM) is extremely favorable, with a payback period as low as 4 to 7 years before expenses. Keene’s rental market is strong, with average rents rising 4–30% year-over-year, and new vinyl siding, updated systems, and proximity to schools, parks, and downtown add value. The chance to finish and customize the second unit and the possibility of a third unit are rare value-add opportunities, although renovation costs and the age of the building are factors to consider[1][2][5].

Finish out the second unit with modern amenities and market it aggressively—mid-range finishes could command above-average local rents. If feasible, explore adding a third unit, as the zoning and layout may support it, significantly boosting income. For sellers, highlight the fresh exterior, mechanical upgrades, and investor upside from current and future unit configurations. For buyers, focus on maximizing rentable square footage and targeting both long-term and short-term tenants, since Keene has relatively low short-term rental saturation[4].