Short answer
An open house is a marketing event. The listing agent represents the seller, and the home is presented in its best light. What you observe in 20–30 minutes is a starting point for questions and follow-up research, not a verdict on whether to buy.
That said, open houses give you something listings can't: smell, spatial proportion, neighborhood sound levels, how the floor feels underfoot, and a chance to ask the listing agent questions while watching how they answer. Used well, an open house visit is useful preparation for a decision, not a substitute for one.
Before you arrive: 10 minutes of review
Reviewing the listing before you go turns a generic walk-through into a targeted one.
Check the listing timeline. How long has it been on the market? Has the price been cut? Did it go pending and come back active? A home that relisted after a failed transaction may have prior buyers who backed out for a reason — worth understanding before you go further. (More on how to read a listing's timeline and price history.)
Note what the photos show and skip. Professional listing photos are curated. Rooms that photograph well are usually shown. Spaces that don't — utility areas, crawlspace hatches, electrical panels, side yards, retaining walls — are often omitted. What the listing doesn't show can be as informative as what it does.
Look at the year built. Property age changes what you're looking for. Homes built before 1978 require a lead paint disclosure. Homes from the 1970s may have aluminum wiring or polybutylene plumbing. Pre-1980 homes in Seattle often have knob-and-tube electrical in unimproved spaces. (See pre-1980 home risks in Seattle for the full checklist.)
Check the map and street view. What's adjacent? A busy arterial, commercial use, power transmission line, or steep terrain may not be obvious from listing photos.
First 10 minutes inside
When I walk into an open house, I pay attention to the things that are hardest to stage or hide.
Smell. A musty or earthy smell in living areas, closets, or near exterior walls often indicates moisture. Heavy candles or plug-in scents staged throughout a home are worth noting — not necessarily a red flag, but something to keep in mind when you get to the utility spaces.
Floor feel. Walk slowly through rooms and pay attention to soft spots, bounce, or areas that feel unlevel. Softness near bathroom fixtures, exterior walls, or under carpet near exterior doors can indicate moisture damage. A noticeably unlevel floor in an older home may warrant foundation or structural review.
Ceiling and wall surfaces. Fresh paint is common staging, but fresh paint in specific corners, around window frames, or on ceiling edges can indicate prior water intrusion that was repainted over. Look for texture that doesn't match the surrounding surface, or areas where paint appears newer than the rest of the room.
Light. Open houses are typically held during daylight in favorable weather. Consider that the home you're evaluating will also need to work on overcast gray days, which are the norm in Greater Seattle most of the year.
Room by room: what to observe
These are observations a buyer can reasonably make during a standard open house visit. None of them are diagnostic — that's what inspectors are for.
Living areas and bedrooms
- Wall and ceiling surfaces for stains, uneven texture, or areas of obvious repair
- Window condition — do they open and lock? Are there signs of moisture around the frames?
- Outlet placement and quantity relative to how you'd actually use the space
Kitchen
- Under the sink: look for staining, soft cabinet floor, or any signs of past leaks
- Exhaust fan: does it actually vent to the outside, or just recirculate?
- Dishwasher area: discoloration on the floor near the dishwasher can indicate a slow leak
Bathrooms
- Caulk and grout condition around the tub, shower base, and floor perimeter
- Soft spots near the base of the toilet or tub surround
- Whether the ventilation fan works (important in PNW humidity)
Utility spaces and basement
- Electrical panel: note the brand. Zinsco, Federal Pacific Stab-Lok, and older FPE panels are frequently flagged in inspections as items to evaluate or replace. Age matters too.
- Water heater: the label usually shows the year it was installed. Most tank water heaters have a 10–15 year useful life.
- Crawlspace access: note where the hatch is. You won't open it at an open house, but your inspector should.
- Any basement or lower-level space: look at the base of walls for efflorescence (white mineral deposits) or moisture staining. Finished basements with new carpet or drywall can obscure water issues.
Exterior and site
- Walk the perimeter if you can. Note the drainage slope — water should run away from the foundation, not toward it.
- Visible roof sections: moss, missing or lifted shingles, or gutters pulling away from the fascia are worth noting.
- Retaining walls: leaning, cracking, or displaced blocks can indicate soil movement and may require specialist review.
- Parking and access: is parking practical for how you'd actually use it?
Questions to ask the listing agent
The listing agent's job is to present the home favorably. They are required to disclose known material defects, but they are not obligated to volunteer information that weakens the listing. The most useful questions are ones where the absence of a clear answer is itself informative.
Questions worth asking:
- "How long has it been on the market, and have you received any offers?"
- "Have there been any permits pulled for the deck, remodel, or addition I'm seeing?"
- "Has the seller made any disclosures about the roof, foundation, sewer, or drainage?"
- "What has the seller's experience been with the home?"
- "Is there anything you'd want a buyer to know before writing an offer?"
How to read the answers: Treat them as one data point. A clear, direct answer to a factual question is a good sign. Vague or deflecting answers to simple questions — about permit history, prior offers, or known issues — are worth noting. If the agent says something like "the sewer was recently scoped," ask for the report.
One thing to keep in mind: The listing agent doesn't represent you. Anything you share about your budget, timeline, or motivation can be passed to the seller. Keep your comments at an open house factual and neutral.
Signals that change what happens next
Some things I observe at an open house change what I'd recommend a buyer do before writing an offer.
- Moisture evidence (smell, staining, soft floors, efflorescence at basement walls): Consider a sewer scope before inspection period, and flag it for the inspector as a priority area.
- Fresh cosmetic work in specific areas (new paint on ceiling corners, new flooring only in one room): Ask about what was repaired. Pull permit records for the property address before writing an offer.
- Listing agent is evasive on straightforward factual questions: The seller may have made disclosures that the listing agent has been instructed to handle carefully. Note what was asked and not answered.
- Electrical panel age or flagged brands: Budget for evaluation or replacement. Ask the inspector to prioritize this.
- Drainage concerns on exterior: Schedule a sewer scope and discuss foundation review with your inspector.
These are reasons to ask more questions, not automatic deal-breakers. Most of them surface regularly in Greater Seattle and have paths to resolution.
What open houses cannot tell you
For clarity: the following are not assessable during a standard open house visit and require scheduled professional review.
Sewer condition. Most Greater Seattle properties should have a sewer scope as part of buyer due diligence. You cannot assess sewer condition from inside the home. (See why sewer scope is non-negotiable in Seattle.)
Electrical inside walls. You can see panels and outlets. What's actually in the walls — wiring type, junction boxes, grounding — requires inspection.
Structural integrity. You can observe visible cracking, unlevel floors, or evidence of past settling. Structural assessment requires professional review.
Crawlspace and attic condition. Moisture levels, vapor barrier, insulation, and framing in these spaces are inspection items.
Permit history. You can note that an addition or remodel happened. Whether it was permitted requires a records check with the city or county.
Roof remaining life. You can note visible moss or obvious deterioration. Lifespan estimate requires an inspector on the roof.
Observations made at an open house are directional. They tell you what questions to ask and what to prioritize in inspection — not whether to buy.