diff --git a/app/Models/Building.php b/app/Models/Building.php
index 2d705c1..d19da3b 100644
--- a/app/Models/Building.php
+++ b/app/Models/Building.php
@@ -19,4 +19,20 @@ class Building extends Model
         'car_parking' => 'boolean',
         'moto_parking' => 'boolean',
     ];
+
+    /**
+     * Get the categories for the building.
+     */
+    public function categories()
+    {
+        return $this->hasMany(Category::class);
+    }
+
+    /**
+     * Get the listings for the building.
+     */
+    public function listings()
+    {
+        return $this->hasManyThrough(Listing::class, Category::class);
+    }
 }
diff --git a/app/Models/Category.php b/app/Models/Category.php
new file mode 100644
index 0000000..effed98
--- /dev/null
+++ b/app/Models/Category.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Category extends Model
+{
+    use HasFactory;
+
+    /**
+     * Get the building that owns the category.
+     */
+    public function building()
+    {
+        return $this->belongsTo(Building::class);
+    }
+
+    /**
+     * Get the listing associated with the category.
+     */
+    public function listing()
+    {
+        return $this->hasOne(Listing::class);
+    }
+}
diff --git a/app/Models/Listing.php b/app/Models/Listing.php
new file mode 100644
index 0000000..a661350
--- /dev/null
+++ b/app/Models/Listing.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Listing extends Model
+{
+    use HasFactory;
+
+    /**
+     * Get the category for the listing.
+     */
+    public function category()
+    {
+        return $this->belongsTo(Category::class);
+    }
+
+    /**
+     * Get the building that owns the listing.
+     */
+    public function building()
+    {
+        return $this->hasOneThrough(Building::class, Category::class, 'id', 'id', 'category_id', 'building_id');
+    }
+}
diff --git a/app/Nova/Building.php b/app/Nova/Building.php
index e576444..5b69c88 100644
--- a/app/Nova/Building.php
+++ b/app/Nova/Building.php
@@ -5,6 +5,8 @@
 use App\Nova\Actions\CreateProject;
 use Illuminate\Http\Request;
 use Laravel\Nova\Fields\Boolean;
+use Laravel\Nova\Fields\HasMany;
+use Laravel\Nova\Fields\HasManyThrough;
 use Laravel\Nova\Fields\ID;
 use Laravel\Nova\Http\Requests\NovaRequest;
 
@@ -46,6 +48,8 @@ public function fields(NovaRequest $request)
             Boolean::make('Active'),
             Boolean::make('Car parking'),
             Boolean::make('Moto parking'),
+            HasManyThrough::make('Listings'),
+            HasMany::make('Categories'),
         ];
     }
 
diff --git a/app/Nova/Category.php b/app/Nova/Category.php
new file mode 100644
index 0000000..0d7c6d7
--- /dev/null
+++ b/app/Nova/Category.php
@@ -0,0 +1,102 @@
+<?php
+
+namespace App\Nova;
+
+use Illuminate\Http\Request;
+use Laravel\Nova\Fields\BelongsTo;
+use Laravel\Nova\Fields\HasOne;
+use Laravel\Nova\Fields\ID;
+use Laravel\Nova\Http\Requests\NovaRequest;
+
+class Category extends Resource
+{
+    /**
+     * The model the resource corresponds to.
+     *
+     * @var class-string<\App\Models\Category>
+     */
+    public static $model = \App\Models\Category::class;
+
+    /**
+     * The single value that should be used to represent the resource when being displayed.
+     *
+     * @var string
+     */
+    public static $title = 'id';
+
+    /**
+     * The columns that should be searched.
+     *
+     * @var array
+     */
+    public static $search = [
+        'id',
+    ];
+
+    /**
+     * Get the fields displayed by the resource.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return array
+     */
+    public function fields(NovaRequest $request)
+    {
+        return [
+            ID::make()->sortable(),
+
+            BelongsTo::make('Building')
+                ->showWhenPeeking()
+                ->sortable()
+                ->filterable(),
+
+            HasOne::make('Listing')
+                ->hideWhenCreating()
+                ->hideWhenUpdating()
+                ->sortable(),
+        ];
+    }
+
+    /**
+     * Get the cards available for the request.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return array
+     */
+    public function cards(NovaRequest $request)
+    {
+        return [];
+    }
+
+    /**
+     * Get the filters available for the resource.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return array
+     */
+    public function filters(NovaRequest $request)
+    {
+        return [];
+    }
+
+    /**
+     * Get the lenses available for the resource.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return array
+     */
+    public function lenses(NovaRequest $request)
+    {
+        return [];
+    }
+
+    /**
+     * Get the actions available for the resource.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return array
+     */
+    public function actions(NovaRequest $request)
+    {
+        return [];
+    }
+}
diff --git a/app/Nova/Listing.php b/app/Nova/Listing.php
new file mode 100644
index 0000000..04475e9
--- /dev/null
+++ b/app/Nova/Listing.php
@@ -0,0 +1,101 @@
+<?php
+
+namespace App\Nova;
+
+use Illuminate\Http\Request;
+use Laravel\Nova\Fields\BelongsTo;
+use Laravel\Nova\Fields\HasOneThrough;
+use Laravel\Nova\Fields\ID;
+use Laravel\Nova\Http\Requests\NovaRequest;
+
+class Listing extends Resource
+{
+    /**
+     * The model the resource corresponds to.
+     *
+     * @var class-string<\App\Models\Listing>
+     */
+    public static $model = \App\Models\Listing::class;
+
+    /**
+     * The single value that should be used to represent the resource when being displayed.
+     *
+     * @var string
+     */
+    public static $title = 'id';
+
+    /**
+     * The columns that should be searched.
+     *
+     * @var array
+     */
+    public static $search = [
+        'id',
+    ];
+
+    /**
+     * Get the fields displayed by the resource.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return array
+     */
+    public function fields(NovaRequest $request)
+    {
+        return [
+            ID::make()->sortable(),
+
+            BelongsTo::make('Category')
+                ->showWhenPeeking()
+                ->sortable()
+                ->filterable(),
+
+            HasOneThrough::make('Building')
+                ->sortable()
+                ->exceptOnForms(),
+        ];
+    }
+
+    /**
+     * Get the cards available for the request.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return array
+     */
+    public function cards(NovaRequest $request)
+    {
+        return [];
+    }
+
+    /**
+     * Get the filters available for the resource.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return array
+     */
+    public function filters(NovaRequest $request)
+    {
+        return [];
+    }
+
+    /**
+     * Get the lenses available for the resource.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return array
+     */
+    public function lenses(NovaRequest $request)
+    {
+        return [];
+    }
+
+    /**
+     * Get the actions available for the resource.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @return array
+     */
+    public function actions(NovaRequest $request)
+    {
+        return [];
+    }
+}
diff --git a/database/factories/CategoryFactory.php b/database/factories/CategoryFactory.php
new file mode 100644
index 0000000..edcb281
--- /dev/null
+++ b/database/factories/CategoryFactory.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Database\Factories;
+
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/**
+ * @extends \Illuminate\Database\Eloquent\Factories\Factory<\App\Models\Category>
+ */
+class CategoryFactory extends Factory
+{
+    /**
+     * Define the model's default state.
+     *
+     * @return array<string, mixed>
+     */
+    public function definition()
+    {
+        return [
+            //
+        ];
+    }
+}
diff --git a/database/factories/ListingFactory.php b/database/factories/ListingFactory.php
new file mode 100644
index 0000000..181d0cc
--- /dev/null
+++ b/database/factories/ListingFactory.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Database\Factories;
+
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/**
+ * @extends \Illuminate\Database\Eloquent\Factories\Factory<\App\Models\Listing>
+ */
+class ListingFactory extends Factory
+{
+    /**
+     * Define the model's default state.
+     *
+     * @return array<string, mixed>
+     */
+    public function definition()
+    {
+        return [
+            //
+        ];
+    }
+}
diff --git a/database/migrations/2023_01_17_100744_create_categories_table.php b/database/migrations/2023_01_17_100744_create_categories_table.php
new file mode 100644
index 0000000..47b2e5c
--- /dev/null
+++ b/database/migrations/2023_01_17_100744_create_categories_table.php
@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('categories', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('building_id')->constrained();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('categories');
+    }
+};
diff --git a/database/migrations/2023_01_17_100754_create_listings_table.php b/database/migrations/2023_01_17_100754_create_listings_table.php
new file mode 100644
index 0000000..d9f23a0
--- /dev/null
+++ b/database/migrations/2023_01_17_100754_create_listings_table.php
@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('listings', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('category_id')->constrained();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('listings');
+    }
+};