What do you do when you love your home, and the neighborhood it’s in but you just wish you had more space? That’s the principal motivation of undertaking a room addition remodeling project.

Every room addition project is unique, so it’s impossible to know an exact cost before planning your design and construction details. But the Remodeling Cost vs. Value Report (www.costvsvalue.com) is the best place to get a ballpark figure of potential cost. This is a trusted source for realistic pricing that helps adjust expectations and plan budgets.

Since 2002, the Remodeling Cost vs. Value Report has been compiling nation-wide renovation data provided by professional and experienced remodeling contractors. We at Mosby Building Arts confidently share this information with homeowners seeking ballpark figures. The report provides a realistic starting point for a conversation about your project.

Here we share with you the Remodeling 2016 Cost vs. Value Report descriptions and average costs of several types of room addition projects in the Metro St. Louis area.

mosby mid-range family room addition

Mid-Range Family Room Addition
“In a style appropriate to the existing house, add a 16-by-25-foot room on a crawlspace foundation with vinyl siding and fiberglass shingle roof. Include drywall interior with fiberglass insulation, pre-finished hardwood floor, and 180 square feet of glazing including windows, atrium-style exterior doors, and two operable skylights. Tie into existing HVAC. Add electrical system to code, including 12 recessed ceiling lights.”
Job Cost: $90,804
Resale Value: $51,368
Cost Recouped: 56.6%
MOSBY NOTE: For the Webster Groves project shown above, the family room addition has a brick exterior to match the rest of the home, plus a new front entry and remodeled dining room, so the budget is higher than that listed by Remodeling Cost vs. Value. See more photos of this project.

mosby mid-range 2-story addition

Mid-Range 2-Story Addition
“Add a first-floor family room and a second-floor bedroom with full bathroom in a 24-by-16-foot two-story wing over a crawlspace. Add new HVAC system to handle addition; electrical wiring to code. Family room: Include a prefabricated gas fireplace; 11 3-by-5-foot double-hung insulated clad-wood windows; an atrium-style exterior door; carpeted floors; painted drywall on walls and ceiling; and painted trim. Bathroom: 5-by-8 feet. Include a one-piece fiberglass tub/shower unit; standard white toilet; wood vanity with solid-surface countertop; resilient vinyl flooring; and mirrored medicine cabinet with built-in light strip; papered walls; and painted trim; exhaust fan. Bedroom: Include walk-in closet/dressing area; carpet; painted walls, ceiling, and trim; general and spot lighting.”
Job Cost: $171,239
Resale Value: $103,897
Cost Recouped: 60.7%
MOSBY NOTE: This 2-story addition in Glendale has a first floor living room with a bathroom, and a master suite above. The addition receives a fiber cement siding painted to match the existing wood siding on the rest of the home.

Mid-Range Master Suite Addition
“Add a 24-by-16-foot master bedroom suite over a crawlspace. Include walk-in closet/dressing area, whirlpool tub in ceramic tile platform, separate 3-by-4-foot ceramic tile shower, and double-bowl vanity with solid-surface countertop. Bedroom floor is carpet; bathroom floor is ceramic tile. Painted walls, ceiling, and trim. General and spot lighting, exhaust fan; electrical wiring to code.”
Job Cost: $118,959
Resale Value: $68,889
Cost Recouped: 57.9%

Mid-Range Bathroom Addition
“Add a full 6-by-8-foot bathroom over a crawlspace with poured concrete walls. Include cultured-marble vanity top with molded sink; standard chrome faucets; 30-by-60-inch white fiberglass tub/shower with ceramic tile surround; single-lever temperature and pressure-balanced faucet; white low-profile toilet; general and spot lighting; electrical wiring to code; mirrored medicine cabinet; linen storage closet or cabinet; vinyl wallpaper; painted trim; and ceramic tile floor.”
Job Cost: $43,877
Resale Value: $24,595
Cost Recouped: 56.1%

mosby upscale bathroom addition

Upscale Bathroom Addition
“Add a new 100-square-foot master bathroom to existing master bedroom over a crawlspace. Include 42-by-42-inch neo-angle shower with ceramic tile walls with accent strip, recessed shower caddy, body-spray fixtures, and frameless glass enclosure. Include a customized whirlpool tub; stone countertop with two sinks; two mirrored medicine cabinets with lighting; a compartmentalized commode area with one-piece toilet; and a humidistat-controlled exhaust fan. Use all color fixtures. Use larger matching ceramic tiles on the floor, laid on the diagonal with ceramic tile base molding. Add general and spot lighting including waterproof shower fixture. Cabinetry shall include a custom drawer base and wall cabinets for a built-in look. Extend HVAC system, and include electric in-floor heating and heated towel bars.”
Job Cost: $81,024
Resale Value: $47,706
Cost Recouped: 58.9%
MOSBY NOTE: The Remodeling description does not address the exterior of the bathroom addition. For the Clayton project shown above – which includes a walk-in closet – the exterior cladding is brick to match the home. See more photos of this bathroom addition.

mosby upscale master suite addition

Upscale Master Suite Addition
“Add a 32-by-20-foot master bedroom suite over a crawlspace. Bedroom: Add a spacious sleeping area with lounging/sitting area adjacent to large master bathroom. Include custom bookcases and built-in storage with millwork details; high-end gas fireplace with stone hearth and custom mantle; and large walk-in closet/dressing area with natural light, mirrors, and linen storage. Add French doors to exterior. Bathroom: Include a large walk-in shower with dual-shower system, stone shower walls and floor, and custom frameless glass enclosure. Add corner-design whirlpool tub bordered on two sides by windows and built into granite or marble platform with custom cabinet front. Include two sinks in separate custom vanities with stone countertops and large mirrors. Create partitioned area for luxury one-piece toilet. General: Add 5-foot-long hospitality center with bar sink, undercounter refrigerator, custom cabinetry, granite or marble countertop, and microwave. Include soundproofing, in-floor heating, custom wall finishes and hardware, general and spot lighting, and lighting controls.”
Job Cost: $248,846
Resale Value: $118,316
Cost Recouped: 47.5%
MOSBY NOTE: The University City master suite addition shown above has a vinyl siding exterior plus a spacious deck as part of its work scope. This illustrates how different the details can be with your room addition, and how it affects project cost.

Please remember that the above information from Remodeling 2016 Cost vs. Value Report is a starting point for exploring your room addition project. To continue the discussion, call Mosby Building Arts at 314.909.1800 or contact us here.