Type of Improvement: Deck
A popular addition, the deck is an ideal do-it-yourself project. If price is a consideration, use pressure-treated wood, the least expensive type of deck lumber by far. The project will include excavation, digging post footings, pouring concrete and in most cases, constructing stairs and railings.

• Recovery can reach 75 percent. Outside living areas are popular in all climates. The project will be more desirable if the deck includes features that provide some privacy. A small entry deck that replaces a crumbling concrete stoop can make a positive impact on the sale of your house.

Type of Improvement: Sunspace
If your home suffers from a lack of natural light, you might consider adding a sunspace. The simplest option is adding a prefabricated solar greenhouse kit with thermal glazing to the back wall of your home. A sliding glass door may be installed.

• Recovery can reach 20 percent. Real estate professionals generally feel that a greenhouse adds limited or no value to a home. You’d get better payback from a sunspace bump-out that expands the square footage and views of an existing room.

Type of Improvement: Swimming Pool
The decision whether or not to add a swimming pool can be problematic; while some buyers actively search for a pool, many others may wary of the upkeep required. Basic work will include digging, pouring concrete, brick work and grading.

• Recovery varies by market. Check out local preferences before building a pool. In colder climates, a pool may add no value because buyers believe it requires too much upkeep for its limited use. In warm climates, however, a pool can deliver a 65 percent return or better.

Type of Improvement: Skylight
To lighten up a room, a skylight seems the obvious choice. A skylight that features insulating glass can be an added attraction. Work includes constructing a skylight shaft of drywall and painting.

• Recovery can reach 30 percent. Many real estate professionals feel that a skylight adds nothing to a home’s value. If your house has a dark, stuffy entry or gloomy bath, a skylight might make it more attractive to buyers.