In an uncertain housing market, your best plan may be a remodeling project that addresses your needs.

Since prehistoric times, spring has been a time of rebirth, renewal, and the revival of a universal human lament: “We need a bigger cave.”

Or, at the very least, a more comfortable one.

Luckily for modern man, the climate for home remodeling projects this year has improved along with the weather. True, the real estate market slowdown has put the brakes on soaring home values, but many homeowners can still count on solid equity and decent interest rates to help them find financing, experts say.

With new home construction slowing, and people willing to spend less on remodeling, you also may find contractors who are more willing to tackle your project. They even may be more inclined to bargain, said Sal Alfano, editorial director of Remodeling magazine. “For the past couple years, it’s been hard to get a [subcontractor] to your house,” he said. “That has loosened up considerably. From that perspective, it’s an ideal time to do a project.”

Amid these signs of hope, caution remains. With the resale market slowing, homeowners may no longer enjoy the latitude to choose the most indulgent projects, remodeling experts say. Instead of installing that spa, you may be better off fixing the roof. Before you indulge yourself with a wine cellar, repair those drafty windows.

“A major capital expense is not something I would recommend, if you want to sell,” said Jeff Bollinger, a Realtor for Prudential Fox & Roach in New Castle County. “If you’re going to do that, plan on staying there a while. You wouldn’t get all that money out of it.”

In tighter financial times, it simply pays more than ever to choose your project wisely, fund it carefully and ask what will pay off in the long run. For folks who are ready to move up to a bigger home, such discrimination may help snag a buyer and sell at a good price. For homeowners who are increasingly being priced out of a tradeup, such remodeling projects can help keep them happy just where they are.

Ultimately, it might be the kind of real estate climate where you find remodeling is wiser than moving, experts say.

One of the most crucial realities to accept is that most projects are unlikely to produce a dollar-for-dollar “payback” in your home’s value. In some regional markets, homeowners can expect to recover 60 percent to 70 percent of construction costs for such projects as a home office or family room. In the Wilmington area, however, the rate for those projects is closer to 50 percent, according to this year’s Cost vs. Value report by Remodeling magazine.

In general, those “recoup” values have dropped to their lowest levels since 2002, the report says. Locally, the highest return rates are for the most practical renovations — siding, windows and roofs — but sellers can still see a relatively high rate of return for a new kitchen or bath, the report found. As fuel prices continue to climb, projects that boost energy efficiency — furnaces and windows — are increasingly wise.

The biggest challenge may be the oldest one — finding a contractor.

“I’m busy as all heck right now,” said Kyle Cycyk, owner of Complete Home Images in New Castle County. “I have roofing and siding jobs lined up until August.” Procrastinating homeowners can speed the search by using such contractor-connection Web sites as Service Magic.com, Contractors.com, ABC.org and AngiesList.com.

Finding the cash can be another tricky exercise. Financial planners discourage homeowners from tapping into retirement funds and caution against obtaining financing through the contractors. Home equity loans and lines of credit frequently offer the advantage of tax deductions for interest paid, but homeowners should be diligent in paying them off as quickly as possible, so that the equity will be there for you again.

Home equity lines of credit can also come with the threat of fluctuating interest rates. For longer-term loans, cash-out refinancing may be a better option, with some cautions. While a “refi” may offer lower interest rates, it also generally comes with higher closing costs and fees than a home equity loan. Using refinancing as a way to pay off remodeling costs can get expensive in the long term — it’s important to repay what you’ve “cashed out” as quickly as possible.

Fortunately, there are signs that upward pressure on some remodeling costs could ease. The price of lumber is expected to drop this year, and a study this month by Harvard’s Joint Center for Housing Studies found the steady growth in home-improvement spending is expected to slow through most of 2007, possibly easing demand for raw materials.

On the other hand, costs of copper, drywall and petroleum-based products are rising, Alfano said. Still, he sees an upbeat outlook for homeowners willing to choose the right project at the right time in the right neighborhood.

“You might find some more favorable pricing now, because it’s a more competitive environment.”