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Photo courtesy of FabCab FabCab is a timber-frame kit home with universal design features. Click photo for more information Eric Santolicito, 35, of Billerica, Mass., had a plan for looking

after his parents as they grew older: The family man bought his sixtysomething parents’ home, demolished it and put up a new prefab house with an in-law suite on the lot. “It was a win-win

situation,” Santolicito says. “We cut our expenses for owning and maintaining two separate, older homes. Now we all have a new house with separate living quarters, and we stayed in the

neighborhood where my sisters live, too. My parents were able to downsize a bit. They now have living, dining, bedroom, bath and kitchen spaces in about 800 square feet — much less for them

to clean and maintain. I can look after all the yard work. And now we have the best on-site child care for our two little ones. Photo courtesy of MEDCottage MEDCottage features options for

advanced medical monitoring equipment. Click photo for more information. SEE ALSO: CUSTOM PREFAB ADUS “Building this house the way we did — it has alleviated a lot of stress for everyone in

the family,” he says. Not everyone is in a position to build a new home to support multigenerational families. But a number of manufactured housing producers are introducing new prefab home

additions with features to support aging at home or near family members. Known in the building industry as ADUs (accessory dwelling units) and in consumer media as “granny pods” and “in-law

apartments,” the new self-contained units incorporate barrier-free, universal designs and options that include electronic monitoring and medical care equipment. All are largely built or

prepared for assembly in a factory, trucked to a building site and set on a foundation, which manufacturers claim cuts construction costs and time from initiation to occupancy. FabCab, a

Seattle-based manufacturer of timber-frame kit homes, offers ADUs ranging in size from 300 to 1,800 square feet. A Salem, Va., startup called N2Care will begin manufacturing the MEDCottage —

a portable ADU for temporary or extended care at home with options for high-tech medical monitoring and security equipment — in January 2011. And The Home Store — a long-established

manufacturer of high-end modular homes in the Northeast — is now offering freestanding, custom-designed “in-law” units. ARE ADUS A GOOD SOLUTION? “From many angles, the ADU concept is a

sound one,” says Susan M. Duncan of the National Resource Center on Supportive Housing and Home Modification at the Ethel Percy Andrus Gerontology Center at University of Southern

California. “An ADU occupies the same space as an apartment but makes it into a private, freestanding home. Privacy is something we all strive for. And families are happier because the TV

can be as loud as you want without disturbing the grandkids doing homework,” SAVE MONEY: GET AARP MEMBER DISCOUNTS ON TRAVEL, SHOPPING AND MORE Jane Marie O'Connor, of 55 Plus, LLC, in

Charlemont, Mass., a building industry consultant, sees at least a potential pitfall in ADUs for those in need of care: “One key element that can still be missing would be human contact.

Living in or near the home of an adult child who is likely gone all day provides little or no stimulation if there is no opportunity for socialization, which many assisted-living facilities

are good at providing.” RELATED * ADUs in a Kit. READ * Medical Caregiving ADU. READ * Custom Prefab ADUs. READ O’Connor believes that ADUs can be a viable alternative, “but not without

consideration. Make the choice with thoughtful purpose, and don’t plan to just park somebody there. Plan how to help her stay engaged in the wider community. “And don’t forget that at-home

health care always takes a toll on the caregiver. Again, plan ahead for support and relief from care duties,” O’Connor says. ADU COSTS VS. CONVENTIONAL ADDITIONS Are ADUs less expensive than

comparable home additions built in the conventional way? If you’re able to put an ADU on your property, the answer is probably yes. Since prefab additions are relatively new, cost data for

direct comparison with conventional home additions aren’t available. Instead, we have to work with comparisons between new prefab and homes  built on site. The consensus among cost

estimators is that prefab costs less than stick. How much less? CostHelper.com  — an online building cost reference tool — says that “modular construction costs 5 to 25 percent less than

traditional homes built on site.” Construction costs vary widely by region and local market conditions. Remodeling is generally more expensive on a square-foot basis than new CLEARING THE

WAY FOR AN ADU Before deciding that an accessory dwelling unit (ADU) is your best bet for your home care needs, you’ll need to do some homework to learn about possible obstacles and

associated potential costs: * Talk to local building and zoning code officials to be sure that regulations, such as the permissible percentage of a lot that may be covered by a structure ,

allow you to place either a permanent or a temporary ADU on your property. * Contact your local power, sewer or water agency to obtain clearance. * Evaluate access to your property. Does

street configuration or topography limit access? * Check on the septic system. If your current septic system accommodates a four-bedroom home, adding an ADU with an additional kitchen and

bath may mean your septic system will no longer comply with regulations and will need updating. * See if there are any restrictions on your lot due to covenants or a homeowner association

agreement. * Consider the impact of installing an ADU on existing mature trees and landscaping. * Talk to a remodeling contractor about the cost of connecting. Investigate any regulations

regarding tying into the existing building systems, such as electrical, plumbing, heating, cooling and fire alarms. * Check about other possible permit requirements. If your home is in or

near wetlands, in a historic district, adjacent to state or local parks or watershed management areas, you may need to file for additional permissions. While most of these situations do not

disqualify a property owner from adding an ADU, you may have to file for a variance or exemption from local regulations. That application process will likely add many months to a building

schedule. construction because contractors must price-in unknowns they may encounter in modifying or building on to an existing structure. Installing an ADU is more like new construction

than remodeling. Therefore, savings for a freestanding modular ADU could be much greater compared with a conventional home addition of comparable size that includes a kitchen and bath —

high-ticket items in home construction calculations. THE POTENTIAL VALUE OF ADUS One position in the cost versus value argument for ADUs holds that the total cost of installation — plus

whatever you may need to spend for home health care professionals to look after sick or disabled relatives — might well be lower than costs for assisted-living or nursing home care, which

generally run from $5,000 to $7,000 a month for an individual. There’s a corollary to the total cost argument for ADUs: While you can’t recoup money spent on assisted living or nursing home

care, that’s not always the case with an ADU. When you don’t need the space for care, it can be repurposed as a home office, studio, rental unit, guest space or nanny quarters. Corinne

Fitzgerald of Fitzgerald Real Estate in Greenfield, Mass., and vice president of the Massachusetts Association of Realtors, agrees, but with caveats. “As long as zoning regulations allow and

the space can be used for another purpose later, an ‘in-law addition’ is a good investment for families looking for a place to accommodate extended family, such as returning kids or

parents.” What is the marketability of an ADU down the road? According to Fitzgerald, how much of the initial costs you can recoup will depend on the real estate market in your area and how

elaborate the addition or dwelling is. “Don’t overimprove,” she advises. “And it’s absolutely critical to check local zoning regulations to be sure that if you are counting on using the

space for a particular purpose later, that use is allowed.” She also recommends that you meet with a local Realtor to be sure that a planned addition won’t price your home out of the

neighborhood. And before settling on an ADU or any addition, do your homework by looking at the cost of renting a separate space nearby for extended family compared with adding space at

home. Finally, Fitzgerald cautions, the dollar amount may not be the best deciding factor. “There’s much to consider besides the bottom line, including the quality of care for a loved one,

travel time and the cost and wear and tear on the caregiver, not to mention your own peace of mind.”