Here are some Minecraft house ideas using birch, oak, and spruce materials for a small design:

1. Cozy Birch Cottage:

   • Structure: A small, one-story cottage with birch wood walls and a slanted roof made of spruce planks.
   • Features: A front porch with oak fence railings, a small garden with flowers, and a chimney made of cobblestone.

2. Rustic Oak Cabin:

   • Structure: A compact cabin with oak logs as the main structure and a gabled roof of spruce stairs.
   • Features: A small deck at the entrance, a fireplace inside, and windows with glass panes for natural light.

3. Spruce Treehouse:

   • Structure: A small treehouse built among spruce trees, using birch for the floor and walls.
   • Features: A ladder for access, a balcony overlooking the surroundings, and a cozy interior with a crafting table and bed.

4. Modern Birch Bungalow:

   • Structure: A minimalist bungalow with birch wood walls and a flat roof made of spruce slabs.
   • Features: Large glass windows, an open floor plan, and a small outdoor seating area with oak benches.

5. Fantasy Oak Hut:

   • Structure: A whimsical hut with a rounded shape, using oak logs and birch for accents.
   • Features: A thatched roof made of spruce leaves, colorful banners, and a small pond nearby for aesthetics.

These designs can be customized further based on your preferences and the specific biome you choose for your build!