Foursite: From Flat Floor Plans to Lived‑In 3D Homes

We built Foursite because we were tired of watching great residential design get stuck inside flat files.

The story always started the same way.

A homeowner sends over Blueprints or 2D floor plans. Designers redraw them. Another tool turns those floor plans into a basic 3D shell. A third person creates interior design renders.

By the time interior design photoreal renders arrive, the energy from that first conversation is gone.

Foursite compresses that entire chain.

You upload 2D floor plans or Blueprints.

We handle the heavy lifting from 2D to 3D.

In a single flow, you convert floor plan to 3D, convert blueprint to 3D, and step into full 3D Visualization.

From there, the fun starts.

Designers can run AI interior design passes on real homes, not abstract templates.

They can layer AI interior décor on top of existing constraints.

They can use interior design 3D visualization to explore multiple layout and styling ideas with the client in the room.

We see AI as an amplifier, not a replacement. Foursite uses AI visualization and AI 3D visualization to do the things computers are good at.

Fast geometry.

Endless variations.

Instant Virtual Staging and AI virtual staging for different looks and lifestyles.

Designers stay in the role of editor and storyteller. Practically, this means fewer tools in the stack. No more bouncing between five apps to go from blueprint to 3D. No more juggling exports just to test a new sofa orientation. The same pipeline that powers quick Virtual Staging can also produce interior design photoreal renders when you need that “wow” moment.

We built Foursite for residential real estate work.

For the everyday homes where families actually live. For designers who care about a child’s study corner as much as a hero shot for social media.

On platforms like Product Hunt, self‑promotion works best when it is honest and focused on the real problem.
So here is ours.

Too many talented designers are trapped in 2D workflows.

Too many homeowners never get to “see” their future space before making big decisions.

If that gap frustrates you as much as it frustrates us, Foursite might feel familiar on day one.

Upload floor plans.

Step into 3D.

Let AI handle the repetition so you can focus on the room where someone will celebrate their next birthday.

Read more: The 3–5–7 rule of Interior Design

Cheers!