Here also is a photo of the entry door, which is on the side of the porch (the tenants will be removing those abominable stickers from the glass before they leave).

I would add an urn or large container of flowers near front entrance. If you add flowers along the front they might look skimpy if the bed isn't wide enough or planted properly. That could get expensive.
Flowers give the impression of home and care. You can never make a second first impression.

Thanks. I'm thinking flowers + foliage is the way to start, perhaps in some window boxes and/or containers. And perhaps some sort of a border along the driveway, for more definition?

I'm not the most experienced gardener in the world so I thought I'd maybe keep it simple with colour, perhaps beginning with some dark green ivy spilling from window boxes mixed in with white flowers like impatiens - though there was a terrible mold that went through impatiens in our area last year. The yard is mostly shaded for much of the day, so I'll have to use plants that don't require full sun. Placement is the big question, for as sharpkl said there's a danger of making it too skimpy, in which case it won't be really noticeable from the curb anyway.

sweet potato plant is a great trailing plant for window boxes, that is what I put in mine. Hostas are great for shade, lavender, day lilies, even a butterfly bush would be beautiful.

Lavender is one of my favourites. I'd thought of hostas, too; this house is on the outskirts of a small city but I don't think the deer would bother them there (where I live on the mountain they consider it an appetizer). Will check out sweet potato plant, never thought of that.

Any thoughts on those outdoor solar lights to line the driveway? I note the neighbour across the street has them and they look quite nice. We're currently living in a family camp while our own house is being built, so I have plenty of furniture (including my own, in storage) for "staging" the house for viewing once the tenants have moved and the place is cleaned and repaired, including an Adirondack chair set that might look nice on the front lawn. I don't want to do too much as part of the appeal of the place is the potential for personalising it. A proper gardener could do wonders with it I'm sure.

some nice solar lights leading to the front door would be nice, remember to make it look like a runaway:) The chair set would love great on front yard perhaps a few feet from the windows with a table between it.

oh, just thought of marigold and petunias for the window boxes as well

Also, what colour for window boxes/containers? Black might look sharp, particularly with white flowers...? White might fade into the house from a distance.

black window boxes with pops of purple, white and perhaps yellow and some green trailing plants, I think will look beautiful.

The driveway really is a runway! That and the size of the lawn make "curb appeal" difficult to accomplish in the literal sense, as from the curb itself you really can't see much (on the plus side, the house has plenty of privacy). There's a possibility of doing something with a nice combination mailbox/house number sign/lantern type thing (if they make those). The house number is hard to see from the street and needs replacing anyway, and the mailbox currently hangs inside the porch, so if you want your mail for the day, you can't lock the porch door. A lantern-style light might be nice at the end of the drive as well.

The house needs contrast. Paint the door and window trim a contrasting neutral color. Blue, gray, dark tan, etc. The door could actually be a bright color. Add some depth by putting a bench and flower urns near the front door, maybe even an ornamental tree. Make sure everything is trimmed, clean and tidy. :). Nice place!

Here's another shot from the street (there is no sidewalk on that side) that gives you some idea of the distance.

That's a great idea, Debbie, it does need contrast. I'm going over with my contractor on Friday to make an inventory, and we'll try to find the trim areas where we could do that, perhaps on the garage as well (there's a simple one-car bay in the back).

It is a tidy little place, and in good nick for being 113 years old.

I think you have it covered with window boxes or urn, a couple of adirondack chairs and a bit of contrasting paint on the trim. The only thing I might add is trimming back the larger trees a bit. It looks like they could be encroaching on the house. It will bring in more light and space around the exterior which looks like it is getting swallowed up.

Yes the trees definitely need a trim and the yard (particularly alongside the house) will require some tidying as the undergrowth is getting bushy. Fortunately my brother is a tree surgeon, so we've got that bit covered for free (or at most a case of beer).

Plantings of some low growing shrubs and flowers along the drive and sidewalk in a curvy design can help break up the blocky feel of the front of the house. They don't have to be really wide or big, but curves add a lot of interest and curb appeal

Shrubs would be nice. Any ideas on what kind? We're in the northeast, so it's a cold snowy climate much of the year.