There's plenty of ways to extract energy from Jupiter's gravity. The problem is how do you do so without lowering your house's orbit?
Tidal Flexing? (probably not worth it)
When two objects interact with gravity there is a tidal force. The sides closest to each other feel a stronger tug than the sides furthest away. This causes them to stretch just a little bit. If they're rotating, this causes a cycle of stretching and compressing which extracts energy from gravity. Eventually it will slow the body's rotation until they are tidally locked.
Another way to extract the tidal force is through a highly elliptical orbit. As the bodies get close to each other the tidal force increases and squeezes. As they move away the tidal force decreases and they expand.
This tidal flexing provides a heating effect which keeps many of Jupiter's small moons much warmer than they would otherwise be.
Let's say you built a huge sphere, it can be hollow because mass does not matter, and set it into a highly elliptical orbit and extracted the energy due to tidal flexing. First problem is where did you get all that material? Second is that putting it into a highly elliptical orbit will cost a lot of energy, so there's a big up-front investment. Will you make that up? I doubt you'll get a solid ROI in your lifetime, but someone is welcome to do the math.
Use Jupiter's Magnetic Field? (unsustainable)
Jupiter has an enormous magnetic field, and your house is moving through it. You could wrap some wire around a coil and extract electrical energy from this field! Brilliant!
...except by doing so you're creating an oppositely charged magnet which Jupiter's magnetic field draws in creating a drag on your house's orbit. You're mortgaging your house's orbit for electricity. This is a theme.
You could kick the electro-magnet out into space. Then it will be in its own orbit. It would send the energy back to you with a laser (also a theme) and eventually crash into Jupiter.
You Can't Just "Drop" Things From Orbit
When you're in orbit in a vacuum you can't just "drop" things. If you let go of something it will continue merrily along with you in orbit traveling at thousands of kilometers per hour. It has inertia keeping it going, just like your house.
In order to lower a thing's orbit you have to slow it down. This has to be done either with drag or with energy. There's no atmosphere to drag against in orbit, so you need to provide energy to slow it down.
You don't need to provide all the energy to slow it down, just enough so it scrapes the atmosphere. That will provide drag to slow it down further and eventually fall into Jupiter.
Space Trash Yo-Yo? (unsustainable)
You extract energy from a gravitational field by dropping things into it. The potential energy converts to kinetic energy which can be harnessed like water falling down a waterfall and turning a turbine. But if you raised and lowered your house you'd more energy lifting yourself back out (because friction and entropy) than you gained lowering yourself.
You need some disposable mass you can toss down the hole. Since you don't want to dispose of your lead figure collection, or your vintage Bricks Of The World set, you can use your trash. Not terribly sustainable, but it'll work for a while. But how do you extract energy from it?
You could put the trash into a special bucket with a turbine in it, wind a wire around the turbine, attach the other end to your house, and drop it like a yo-yo. The wire unwinds as it falls, spins the turbine, and the wire transmits power back to your house. Perfect!
Except it costs more energy than you'll extract.
Even if you let the trash-turbine fall off the end of the wire, the wire is tugging on your house with equal energy as you're extracting and pulling it into a lower orbit. You'll need to expend more energy (not equal because, again, entropy) to keep yourself in orbit.
Space Wind Laser Turbines! (unsustainable or won't work)
Instead, your trash generator... bomb will have a wind turbine attached to it. As it falls through Jupiter's atmosphere the wind generated will turn the turbine and extract energy from its fall. A laser transmits the energy back to your house.
But eventually you'll run out of trash. Can we make this sustainable? Yes!
Cut out the middle man. Instead of using gravitational energy to create wind power, use Jupiter's own copious wind power directly. Drop floating wind turbines into Jupiter's atmosphere and have it shoot the power back to you with lasers. They'll float around in Jupiter's atmosphere until they wear out. With a little engineering they can be made to steer and avoid storms.
How much power can you provide? The potential wind energy of the Earth is about 250 TW. Jupiter's atmosphere is enormous in comparison and more turbulent, so it's limited by how many wind turbine dirigible parts you brought along and how long you can make them last.
...except, as @anaximander pointed out in the comments, it won't work. The atmosphere is a fluid, and the turbine is floating in that fluid. It will move with the wind. This is like putting a water wheel on a boat in a river. The turbine has to be anchored to something and there's nothing to anchor it to.