diff --git a/app/Models/Building.php b/app/Models/Building.php
index f0e7773..34a6c06 100755
--- a/app/Models/Building.php
+++ b/app/Models/Building.php
@@ -3,6 +3,7 @@
 namespace Modules\Realestate\Models;
 
 use Modules\Base\Models\BaseModel;
+use Modules\Realestate\Models\Estate;
 
 class Building extends BaseModel
 {
@@ -20,4 +21,13 @@ class Building extends BaseModel
      */
     protected $table = "realestate_building";
 
+    /**
+     * Add relationship to Estate
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function estate()
+    {
+        return $this->belongsTo(Estate::class);
+    }
+
 }
diff --git a/app/Models/BuildingUnitSetup.php b/app/Models/BuildingUnitSetup.php
index c7e2a60..e751c7a 100755
--- a/app/Models/BuildingUnitSetup.php
+++ b/app/Models/BuildingUnitSetup.php
@@ -3,6 +3,7 @@
 namespace Modules\Realestate\Models;
 
 use Modules\Base\Models\BaseModel;
+use Modules\Realestate\Models\Building;
 
 class BuildingUnitSetup extends BaseModel
 {
@@ -20,4 +21,13 @@ class BuildingUnitSetup extends BaseModel
      */
     protected $table = "realestate_building_unit_setup";
 
+    /**
+     * Add relationship to Building
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function building()
+    {
+        return $this->belongsTo(Building::class);
+    }
+
 }
diff --git a/app/Models/Estate.php b/app/Models/Estate.php
index dce4594..13c7de5 100755
--- a/app/Models/Estate.php
+++ b/app/Models/Estate.php
@@ -3,6 +3,7 @@
 namespace Modules\Realestate\Models;
 
 use Modules\Base\Models\BaseModel;
+use Modules\Realestate\Models\Town;
 
 class Estate extends BaseModel
 {
@@ -20,4 +21,13 @@ class Estate extends BaseModel
      */
     protected $table = "realestate_estate";
 
+    /**
+     * Add relationship to Town
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function town()
+    {
+        return $this->belongsTo(Town::class);
+    }
+
 }
diff --git a/app/Models/ReadingElectricity.php b/app/Models/ReadingElectricity.php
index 0d16925..192560e 100755
--- a/app/Models/ReadingElectricity.php
+++ b/app/Models/ReadingElectricity.php
@@ -2,7 +2,9 @@
 
 namespace Modules\Realestate\Models;
 
+use Modules\Account\Models\Invoice;
 use Modules\Base\Models\BaseModel;
+use Modules\Realestate\Models\Tenancy;
 
 class ReadingElectricity extends BaseModel
 {
@@ -21,4 +23,22 @@ class ReadingElectricity extends BaseModel
      */
     protected $table = "realestate_reading_electricity";
 
+    /**
+     * Add relationship to Tenancy
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function tenancy()
+    {
+        return $this->belongsTo(Tenancy::class);
+    }
+
+    /**
+     * Add relationship to Invoice
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function invoice()
+    {
+        return $this->belongsTo(Invoice::class);
+    }
+
 }
diff --git a/app/Models/ReadingGas.php b/app/Models/ReadingGas.php
index 6112e22..45ab8f9 100755
--- a/app/Models/ReadingGas.php
+++ b/app/Models/ReadingGas.php
@@ -2,7 +2,9 @@
 
 namespace Modules\Realestate\Models;
 
+use Modules\Account\Models\Invoice;
 use Modules\Base\Models\BaseModel;
+use Modules\Realestate\Models\Tenancy;
 
 class ReadingGas extends BaseModel
 {
@@ -20,4 +22,22 @@ class ReadingGas extends BaseModel
      */
     protected $table = "realestate_reading_gas";
 
+    /**
+     * Add relationship to Tenancy
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function tenancy()
+    {
+        return $this->belongsTo(Tenancy::class);
+    }
+
+    /**
+     * Add relationship to Invoice
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function invoice()
+    {
+        return $this->belongsTo(Invoice::class);
+    }
+
 }
diff --git a/app/Models/ReadingWater.php b/app/Models/ReadingWater.php
index 5cb295b..5f7f384 100755
--- a/app/Models/ReadingWater.php
+++ b/app/Models/ReadingWater.php
@@ -2,7 +2,9 @@
 
 namespace Modules\Realestate\Models;
 
+use Modules\Account\Models\Invoice;
 use Modules\Base\Models\BaseModel;
+use Modules\Realestate\Models\Tenancy;
 
 class ReadingWater extends BaseModel
 {
@@ -20,4 +22,22 @@ class ReadingWater extends BaseModel
      */
     protected $table = "realestate_reading_water";
 
+    /**
+     * Add relationship to Tenancy
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function tenancy()
+    {
+        return $this->belongsTo(Tenancy::class);
+    }
+
+    /**
+     * Add relationship to Invoice
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function invoice()
+    {
+        return $this->belongsTo(Invoice::class);
+    }
+
 }
diff --git a/app/Models/Region.php b/app/Models/Region.php
index 147b7e8..029302e 100755
--- a/app/Models/Region.php
+++ b/app/Models/Region.php
@@ -3,6 +3,8 @@
 namespace Modules\Realestate\Models;
 
 use Modules\Base\Models\BaseModel;
+use Modules\Core\Models\Country;
+use Modules\Realestate\Models\State;
 
 class Region extends BaseModel
 {
@@ -20,4 +22,22 @@ class Region extends BaseModel
      */
     protected $table = "realestate_region";
 
+    /**
+     * Add relationship to Country
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function country()
+    {
+        return $this->belongsTo(Country::class);
+    }
+
+    /**
+     * Add relationship to State
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function state()
+    {
+        return $this->belongsTo(State::class);
+    }
+
 }
diff --git a/app/Models/Tenancy.php b/app/Models/Tenancy.php
index 466d87c..75f13ba 100755
--- a/app/Models/Tenancy.php
+++ b/app/Models/Tenancy.php
@@ -3,6 +3,8 @@
 namespace Modules\Realestate\Models;
 
 use Modules\Base\Models\BaseModel;
+use Modules\Partner\Models\Partner;
+use Modules\Realestate\Models\Unit;
 
 class Tenancy extends BaseModel
 {
@@ -20,4 +22,22 @@ class Tenancy extends BaseModel
      */
     protected $table = "realestate_tenancy";
 
+    /**
+     * Add relationship to Unit
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function unit()
+    {
+        return $this->belongsTo(Unit::class);
+    }
+
+    /**
+     * Add relationship to Partner
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function partner()
+    {
+        return $this->belongsTo(Partner::class);
+    }
+
 }
diff --git a/app/Models/TenancyInvoice.php b/app/Models/TenancyInvoice.php
index 68e761f..a813a7d 100755
--- a/app/Models/TenancyInvoice.php
+++ b/app/Models/TenancyInvoice.php
@@ -2,7 +2,9 @@
 
 namespace Modules\Realestate\Models;
 
+use Modules\Account\Models\Invoice;
 use Modules\Base\Models\BaseModel;
+use Modules\Realestate\Models\Tenancy;
 
 class TenancyInvoice extends BaseModel
 {
@@ -20,4 +22,22 @@ class TenancyInvoice extends BaseModel
      */
     protected $table = "realestate_tenancy_invoice";
 
+    /**
+     * Add relationship to Tenancy
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function tenancy()
+    {
+        return $this->belongsTo(Tenancy::class);
+    }
+
+    /**
+     * Add relationship to Invoice
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function invoice()
+    {
+        return $this->belongsTo(Invoice::class);
+    }
+
 }
diff --git a/app/Models/TenancyService.php b/app/Models/TenancyService.php
index 46a3041..981efe0 100755
--- a/app/Models/TenancyService.php
+++ b/app/Models/TenancyService.php
@@ -3,6 +3,7 @@
 namespace Modules\Realestate\Models;
 
 use Modules\Base\Models\BaseModel;
+use Modules\Realestate\Models\Tenancy;
 
 class TenancyService extends BaseModel
 {
@@ -20,4 +21,13 @@ class TenancyService extends BaseModel
      */
     protected $table = "realestate_tenancy_service";
 
+    /**
+     * Add relationship to Tenancy
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function tenancy()
+    {
+        return $this->belongsTo(Tenancy::class);
+    }
+
 }
diff --git a/app/Models/Town.php b/app/Models/Town.php
index 71c2336..eab1920 100755
--- a/app/Models/Town.php
+++ b/app/Models/Town.php
@@ -3,6 +3,7 @@
 namespace Modules\Realestate\Models;
 
 use Modules\Base\Models\BaseModel;
+use Modules\Realestate\Models\Region;
 
 class Town extends BaseModel
 {
@@ -20,4 +21,13 @@ class Town extends BaseModel
      */
     protected $table = "realestate_town";
 
+    /**
+     * Add relationship to Region
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function region()
+    {
+        return $this->belongsTo(Region::class);
+    }
+
 }
diff --git a/app/Models/Unit.php b/app/Models/Unit.php
index 3464cdb..fafbd91 100755
--- a/app/Models/Unit.php
+++ b/app/Models/Unit.php
@@ -3,6 +3,7 @@
 namespace Modules\Realestate\Models;
 
 use Modules\Base\Models\BaseModel;
+use Modules\Realestate\Models\Building;
 
 class Unit extends BaseModel
 {
@@ -20,4 +21,13 @@ class Unit extends BaseModel
      */
     protected $table = "realestate_unit";
 
+    /**
+     * Add relationship to Building
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function building()
+    {
+        return $this->belongsTo(Building::class);
+    }
+
 }
diff --git a/app/Models/UnitSetup.php b/app/Models/UnitSetup.php
index 1799b36..1eaa584 100755
--- a/app/Models/UnitSetup.php
+++ b/app/Models/UnitSetup.php
@@ -3,6 +3,7 @@
 namespace Modules\Realestate\Models;
 
 use Modules\Base\Models\BaseModel;
+use Modules\Realestate\Models\Unit;
 
 class UnitSetup extends BaseModel
 {
@@ -20,4 +21,13 @@ class UnitSetup extends BaseModel
      */
     protected $table = "realestate_unit_setup";
 
+    /**
+     * Add relationship to Unit
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function unit()
+    {
+        return $this->belongsTo(Unit::class);
+    }
+
 }