Is $435,000 supportable for this 1,290 sq ft Seattle villa?

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I’m deciding whether the $435,000 asking price is supportable before paying for a formal local appraisal. It is a Seattle 3-bed villa of approximately 1,290 sq ft, in average condition. Light and location are the strongest features; dated finishes and possible energy-performance costs are the weak points.

I found three asking-price comparables but only one completed sale. My spreadsheet looks reasonable until management costs and one bad year are included. What range would you model for condition and floor-area adjustments, and which missing fact could most change the result?
 
I would anchor the exercise to the completed sale, provided it is genuinely comparable in date, micro-location and ownership type. The three listings show current competition, but not what buyers ultimately paid.

For condition, use estimated work costs plus a contingency rather than a blanket percentage. For floor area, test a range based on the sold property’s implied price per square foot, since extra space is worth less if it is poorly laid out. How close is that sale, and is this detached fee-simple property or some form of condominium interest?
 
One completed sale should not automatically outweigh everything else. It could have unusual motivation, parking, outdoor space or a much better block. The active listings still matter because a buyer will compare this villa with what is available now.

My biggest missing facts would be exact micro-location, dedicated parking and usable outdoor space. Those differences may matter more than a modest floor-area adjustment.
 
That’s fair—I wouldn’t treat the sale as unquestionable truth. For a first-pass sensitivity model, rather than a claimed Seattle market rule, I’d run condition at 0%, 4% and 8% below an otherwise similar updated property. For area, I’d apply 50% to 100% of the comparable’s implied per-square-foot figure to the size difference, depending on layout and utility. If the conclusion changes across that range, the evidence is too thin to rely on.
 
The word “villa” makes the ownership structure especially important here. If it is actually within a condominium or townhouse arrangement, remaining lease terms, service charges and responsibility for exterior work could materially alter both value and the management-cost assumptions. If it is ordinary fee-simple ownership, those points may be irrelevant. I’d establish that before refining percentages.
 
A practical next step is to put the four properties into one grid: completed or active, sale/list date, exact location, legal form, floor area, condition, parking and outdoor space. Keep energy work separate until there is evidence of what is needed.

Also separate market valuation from the investment model. Management and a bad year affect your acceptable price and cash flow, but they do not necessarily translate dollar-for-dollar into a comparable-sales adjustment. If the formal appraisal lands near the asking price while your stressed model still fails, that is a return problem rather than proof the appraisal is wrong.
 
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