How much will that home renovation cost you?

Home sweet home it may be, but plenty of homeowners took on projects last year to make their space an even better fit for their needs.

Nearly two-thirds of users of home remodeling and design website Houzz did a remodeling or redecorating project last year, according to the a site survey of 260,000 consumers (including 170,000 based in the United States). Key reasons: Improving the look, feel and functionality of the space and boosting resale value.

Trends show several signs of economic improvement—or at least, improved consumer confidence, said Nino Sitchinava, principal economist for Houzz. "Just the magnitude of the discretionary projects is quite remarkable," she said. Better still, they're not borrowing to complete the work: 87 percent said they paid in cash from savings.

Prices varied by scale of the project and whether homeowners hired a pro or went the do-it-yourself route, but Houzz came up with average costs for the 22 most popular remodeling and upgrade projects undertaken by homeowners. The popularity percentages are based on Houzz users who did a remodeling project last year and the percentages for 2015 plans are based on users who want to make big-ticket purchases this year.

—By CNBC.com's Kelli B. Grant
Posted 13 June 2015

Project popularity: 41 percent of Houzz users tackled their garden beds or borders and 20 percent improved their lawn.

Cost details: The reported overall average for either improving beds and borders or the lawn was $700.

Project popularity: 27 percent of Houzz users remodeled their kitchen and another 2 percent added to the size of their kitchen. Among site users who took on a redecorating project last year, 22 percent redecorated their kitchen.

Cost details: Reported averages for a small kitchen projects (less than 201 square feet), for example, ranged from $11,700 on a minor remodel to $29,400 for a major one. On bigger kitchens, the overall average spanned $17,800 to $42,400.

2015 plans: 18 percent plan to invest in new kitchen appliances, 17 percent, in kitchen plumbing fixtures and 17 percent, in kitchen cabinets. Another 23 percent are upgrading their countertops.

Project popularity: 28 percent of Houzz users upgraded their plumbing.

Cost details: Only 17 percent hired a plumber, specifically, although others may have called in a kitchen or bath remodeler, general contractor or other specialist. The reported overall average spent on plumbing upgrades was $2,200.

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Project popularity: 26 percent of Houzz users upgraded their electrical systems.

Cost details: Only 18 percent hired an electrician, specifically, although others may have called in a general contractor or other specialist. The reported overall average spent on electrical upgrades was $2,300.

2015 plans: 31 percent plan to invest in new lighting.

Project popularity: 19 percent of Houzz users remodeled their master bathroom and another 4 percent added to the size of that bathroom. Another 23 percent remodeled a guest bathroom, with 2 percent more adding to the size of a guest bathroom. Meanwhile, 17 percent redecorated a guest bathroom and 16 percent, their master bathroom.

Cost details: Reported averages for a large master bathroom (more than 101 square feet), for example, ranged from $8,300 on a minor remodel to $18,800 for a major one. For a small guest bathroom, the overall average spanned $3,200 to $7,200.

2015 plans: 30 percent plan to invest in new bathroom plumbing fixtures and 22 percent in new tile (not necessarily in the bathroom).

Project popularity: 22 percent remodeled their living room or family room and another 2 percent added to the size of that space. Among site users who took on a redecorating project last year, 48 percent redecorated their living or family room.

Cost details: The reported overall average for a living or family room remodel was $3,700; among those adding square footage to the space, costs averaged $23,400.

2015 plans: 21 percent are planning for new rugs and 13 percent, carpeting. Another 27 percent are expecting to lay another kind of new flooring.

Project popularity: 23 percent upgraded or added to home automation systems.

Cost details: The reported overall average spent on home automation projects was $800.

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Project popularity: 18 percent renovated a porch or attached deck. Another 23 percent renovated a patio, terrace or detached deck.

Cost details: The reported overall average spent on a porch or attached deck was $4,200; for a patio, terrace or detached deck, $2,300.

2015 plans: 18 percent plan to invest in new outdoor furniture, 13 percent, in a deck or decking and 15 percent, in outdoor products like a BBQ or firepit.

Project popularity: 20 percent painted their home's exterior.

Cost details: The reported overall average spent on exterior paint upgrades was $2,500.

Project popularity: 18 percent upgraded their home's exterior doors.

Cost details: The reported overall average spent on door upgrades was $2,000.

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Project popularity: 19 percent upgraded their heating system. Another 15 percent upgraded their cooling system, and 12 percent upgraded their ventilation nsystem.

Cost details: The reported overall average spent on heating upgrades was $5,400; on cooling, $4,700; and on ventilation, $800.

Project popularity: 16 percent upgraded their windows or skylights.

Cost details: The reported overall average spent on windows or skylights was $5,600.

2015 plans: 20 percent plan to invest in new windows or doors, and 29 percent in new window treatments like curtains or blinds.

Project popularity: 14 percent remodeled their master bedroom and another 2 percent added to the size of that space. Another 14 percent remodeled a guest bedroom, with 2 percent more adding to its size. Among site users who took on a redecorating project last year, 23 percent said they redecorated a master bedroom, and another 23 percent, a guest bedroom.

Cost details: The reported overall average for a guest bedroom remodel was $1,500; among those adding square footage to the space, costs averaged $11,000. For a master bedroom, the average remodel cost $2,600. Those adding to square footage to the space spent an average $18,300.

2015 plans: 11 percent are buying mattresses and 32 percent, decorative accessories including pillows and bedding.

Project popularity: 13 percent remodeled their closet and another 3 percent added to the size of that space.

Cost details: The reported overall average for a closet remodel was $1,400; among those adding square footage to the space, costs averaged $3,900.

2015 plans: 21 percent are buying storage or organization systems (for closets, but also garages and other spaces).

Project popularity: 15 percent upgraded or added to home entertainment systems.

Cost details: The reported overall average spent on home media projects was $1,900.

Project popularity: 15 percent renovated their roof.

Cost details: The reported overall average spent on roofing projects was $10,100.

2015 plans: 11 percent plan to invest in roofing or exterior siding.

Project popularity: 13 percent remodeled their dining room and another 1 percent added to the size of that space. Among homeowners who took on decorating projects last year, 21 percent redecorated their dining room.

Cost details: The reported overall average for a dining room remodel was $2,000; among those adding square footage to the space, costs averaged $10,100.

2015 plans: 30 percent are buying furniture, and 39 percent are painting.

Project popularity: 12 percent remodeled their laundry room and another 2 percent added to the size of that space.

Cost details: The reported overall average for a laundry room remodel was $2,000; among those adding square footage to the space, costs averaged $6,400.

2015 plans: 8 percent plan to buy new laundry appliances.

Project popularity: 10 percent remodeled their home office and another 1 percent added to the size of that space.

Cost details: The reported overall average for a home office remodel was $1,900; among those adding square footage to the space, costs averaged $10,500.

Project popularity: 9 percent upgraded or added to home security systems.

Cost details: The reported overall average spent on home security projects was $1,100.

Project popularity: 9 percent remodeled their driveway.

Cost details: The reported overall average for a driveway remodel was $4,500.

Project popularity: 6 percent converted their basement into a living space. Another 6 percent waterproofed their basement

Cost details: The reported overall average for a basement conversion was $10,400; those waterproofing spent an average $3,000.