Write down what you're seeing
Jot down where it's happening, when you first noticed it, any tie-in to weather, how it's changed, and whatever work has already been done. A few photos and rough measurements taken ahead of time make the first call go a lot faster.
Read the local context
Which category the house falls into changes the recommendation before any product is compared. Historic in-town properties frequently hold original sash worth assessing for repair, in openings that are rarely standard sizes, with coatings whose age governs how the work may proceed. Student rentals often carry a mix of units replaced piecemeal between tenancies, so matching what is already there is its own problem. Mid-century neighborhoods are the straightforward case, generally aluminum or early insulated units where the frame rather than the glass is the weak point. Measure several openings before shopping.
Ask about what won't be visible later
How the unit gets installed, the flashing detail, the sill's condition, frame material, glazing package, trim finish, and which way the wall faces the sun all weigh as heavily as which window you pick. Get that spelled out in writing before everything gets buttoned up.
Line up full proposals, not price tags
Check what's covered for site protection, access, materials, permitting, testing, cleanup, restoration work, listed exclusions, warranty terms, and how change orders get handled.
What official local sources add
This is the trade where a Certificate of Appropriateness is most likely to apply, and where it can change the answer rather than merely add a step. On a designated property, window review can reach sash configuration, material and profile, and it may carry an expectation that original units are repaired rather than replaced -- which is a different project with a different price. With dozens of registered resources across the city-county government, designation is genuinely common here, and it is settled by address rather than by how a street looks. Confirm status before anything is ordered.
Sources were reviewed June 20, 2026. Flood-zone status, historic-district rules, and permit requirements vary parcel by parcel — check current requirements with Athens-Clarke County directly before authorizing work.