The facts in your message are bit confusing. Do you seek to tap into the equity of the house you built in 2007, or do you wish to sell this property?
If you seek a home equity line of credit (HELOC) or a second mortgage you may face an uphill struggle. First, property values across the US have fallen since 2007. Depending on your location, location, and location, your property may be worth 10% to 50% of what you paid for it in 2007 regardless of the improvements you made to it since your purchase.
Second, the market for HELOCs has all but disappeared, and lenders that offer HELOCs are doing so at rates that are not attractive. Third, the same can be said for so-called home-improvement loans, which are simply second mortgages.
You did not mention the balance of your mortgage or the fair market value of comparable properties in your area. If you have a loan-to-value of 80%, then a mortgage refinance at today's low rates might free-up cash flow to allow you to tackle the remodeling you have in mind. See the Bills.com mortgage refinance savings center to get no-cost quotes from up to five Bills.com partners who offer refinances in your area.
I hope this information helps you Find. Learn & Save.