If it is a potential "teardown" as in small older home, size of lot us hugely important to value, as the value is impacted by what someone might be able to build on that lot in the far distant future. A good way to check that is to see how much of the tax assessed value is attributable to the land vs. the improvement. If th land is the primary valuation point for tax purposes, the size of the lot is more important. If the valuation is 50% or more the improvement vs the land...then the lot size may not be as important.
Still, if you put that same house on a 5,000 or 6,000 square foot lot vs 3,500 sf lot...it clearly would have a different value. So size of lot IS in fact a valuation point. Especially when it is under 5,000 sf.
That is a little on the small side. It does however depend on where in Freemont you are talking about. As you get closer to the bars and shops the lots get much smaller. Nearly all of them have been converted to condos, townhouses and rentals as well. As you go up the hill however 5-6,000 square foot lots are more the norm.
Seattle land use code plays a large part in what is small or average. If you check the zoning and the zone is SF 5000, then it may mean that many houses are located on lots that are near the 5000 sf size. A 3000 would be non conforming. if the lot is in an LDT zone, which would allow two units to be built or occupy the lot, thus the 3000 is large. Send me an email if you want me to check the zoining and land use issues for you. danielbretzke.com
I have suggested in past posts, and will continue to suggest in the future, that as a buyer you Google every agent that responds to your question here on Trulia, learn as much as you can about who they are online, read their client testimonials, so you know what their clients are saying about them, and then give us each a call and just ask us why we think you should work with us instead of another agent. Then, pick the best fit for you and let them go to work for you with the skill and knowledge that they have. I hope to hear from you soon.