Before you list, clean what buyers see first in the photos and from the curb: the front of the house, roof streaks, driveway and walk, windows, gutters, and the front beds. Cleaning is the cheapest exterior work that changes how a house looks, but it does not replace repairs. Rob's Exterior Services in Woodstock can bundle the work; text (815) 451-0106 with a photo for a free quote.
The short version
- Buyers form an opinion from the street and from the first listing photo. Fix what shows there before anything else.
- Clean first, then judge what needs repair. Many stains that look like damage wash off, and some damage hides under dirt.
- Roof streaks, green siding, and a dark driveway are the most visible and most fixable.
- Do not clean over problems. Rotten trim, failing shingles and cracked concrete should be disclosed or repaired, not just hidden.
- Schedule the exterior work a week or two ahead of photos, so the house is clean and dry on photo day.
- Ask your listing agent what to do and what to skip. Local market conditions change the order of priorities.
What a buyer actually sees in the first ten seconds
Most buyers meet your house on a screen. The first listing photo is almost always the front exterior, taken from the street or driveway. Then comes the drive-by, when a buyer who liked the photos decides whether to book a showing. In both moments the buyer is reading condition, not details. A house that looks cared for gets the benefit of the doubt on what they cannot see. A house with a streaked roof, green siding and a gray-black driveway starts with a deficit.
That is why exterior cleaning is the usual first step in preparing a house to sell. It does not change what the house is. It removes the film that makes a sound house look neglected. This guide is for owners in McHenry County and nearby northern Illinois who want to know what to do, in what order, and where cleaning stops being the answer.
One caution before the list. Nothing here replaces advice from your listing agent, who knows what is moving in your price range and what your buyers expect.
Rank the work by how visible it is from the curb
Walk to the street and look back at the house as a buyer would, then take a photo on your phone. The things that jump out in that photo are your priority list. In northern Illinois they tend to be the same few items.
The front-facing roof slope often shows dark streaks, especially on shaded or north-facing sides. The siding may be green or gray along the shaded wall or under the eaves. The driveway and front walk may be darkened by algae, leaf tannin, and years of salt. Windows are hazy with pollen and mineral spotting. Gutters have a visible sag or leaf sprouts. The front bed is overgrown or bare.
- Roof streaks on the front slope.
- Green or gray film on siding, trim, the porch and the garage door.
- A dark or stained driveway, walk and front steps.
- Hazy windows and dirty screens.
- Overflowing, sagging or stained gutters.
- Debris, dead plants and brush piles in the yard or at the side of the house.
The roof: the biggest visual change for the least effort
Black streaks on asphalt shingles are the single most noticeable flaw on many northern Illinois houses, and buyers and inspectors alike tend to read them as a worn-out roof. In fact the streaks are usually a surface growth of Gloeocapsa magna, which is a cosmetic problem before it is a structural one. See What Are the Black Streaks on Your Roof, and Should You Remove Them? for what it is and how it spreads.
Manufacturers of asphalt shingles tend to steer owners toward gentle, low-pressure methods, because forceful water can knock off the granules that shield the shingle. So the sensible route is a soft-wash method, as laid out in Is Roof Washing Safe for Asphalt Shingles?. roof washing starts from $250.
The honest limit: cleaning cannot make worn shingles new. If the roof is curling, cracked or missing granules in patches, a roofer needs to assess it, and the seller should expect the inspection to say so. A clean roof with a real problem still has a real problem.
Siding, trim and the front entry
A whole-house wash is the second big change. The north side and any shaded wall build up algae, and pollen and dust accumulate under eaves and around the porch. A low-pressure wash removes the film without forcing water behind siding. Mold and Algae on Siding: What It Is, Whether It Matters, and How to Clean It explains the cause and why it comes back. Rob quotes house washing from a photo, since the size, stories and condition drive it. For the difference between methods, read Soft Washing vs Pressure Washing: Which Does Your Surface Need?.
Do the entry as well. The front door, porch rails, light fixtures, house numbers and the garage door are what buyers look at while the agent fumbles with the lockbox. Wipe those down. Replace burned-out bulbs and dead hardware. Touch up peeling paint on the door or trim.
If you see rot in trim, soft wood at the porch posts, or caulk that has split open, repair it. Buyers' inspectors find those, and cleaning that draws attention to them without fixing them does not help.
Driveway, walkway and patio
A concrete driveway that has gone gray-black is one of the easiest things to fix and one of the most noticeable in photos. Surface algae, tannin from leaves, oil spots and rust marks all wash out to varying degrees. Salt scaling and flaking do not. If the surface is spalling, cleaning will show it more clearly, not hide it.
Include the front walk, steps and any patio that appears in the listing photos. Rust stains from furniture and tire marks can sometimes lift and sometimes not, so ask the contractor what to expect before you count on a result. For salt, rust and efflorescence in particular, see White Powder, Rust Stains and Salt Damage on Concrete: What Is It and What Helps?.
driveway & patio cleaning gets a price once Rob has looked at pictures of the place. For smaller jobs, pressure washing covers smaller hard-surface jobs, and a photo helps Rob quote them.
Windows, gutters and the small stuff that shows in photos
Dirty windows read as a dirty house, and from the street they show up as haze in the listing photos. Clean glass also lets in more light, which is what the interior photographer will want. Wash the screens or take them out entirely for the photos.
Gutters matter for two reasons. They show on the roof line, and a buyer's inspector will check that they drain. Overflowing gutters stain siding and trim in streaks below them. A cleaning plus a check of the downspouts and the grade at the foundation is cheap compared to a surprise on the inspection report. For frequency, see How Often Should You Clean Gutters in Northern Illinois?.
Remove any brush, deadfall, or stacked debris from the yard, and cut back growth that touches the siding or covers a window. A yard with a pile of cut branches at the side suggests deferred maintenance whatever the house looks like.
Timing, bundling and what to skip
Plan the exterior work for one to two weeks before photos, so the surfaces are dry and clean on the day, and so any hidden problems the cleaning reveals can be addressed before the listing goes live. In northern Illinois, winter and early spring offer a short window, since you cannot wash safely below freezing and lawns and beds look worst in March. In those months, focus on what can be done: gutters, windows, hard surfaces when temperatures allow, and clearing debris.
If you need several things done, a bundle can be simpler than hiring separately. Rob's curb appeal packages combine services into one quote and one visit schedule, and Rob handles the job personally rather than passing it to a crew he has not met.
What to skip: a full deck restain if the deck is in decent shape and merely dirty (a clean often looks good enough), elaborate landscaping, and anything your agent says the local buyers will not pay attention to. Spend where the photo shows it.
Where cleaning stops and repair or disclosure begins
Cleaning is cosmetic. It does not repair a roof, replace rotted wood, or fix a cracked foundation, and it should never be used to hide them. Illinois sellers have disclosure obligations about known defects, and your agent or attorney can tell you what applies. This guide is not legal advice.
In practice the sensible approach is to clean first, look again, and then decide. Sometimes a stain disappears and the house looks great. Sometimes the cleaning shows a problem that was masked by grime, and it is better to learn that before a buyer's inspector does.
If you are not sure what you are looking at, text a few photos to Rob at (815) 451-0106. Rob will say plainly which parts are a cleaning job and which belong to a roofer, mason or carpenter.