diff --git a/esphome/components/ld2420/binary_sensor/ld2420_binary_sensor.h b/esphome/components/ld2420/binary_sensor/ld2420_binary_sensor.h
index ec52312f92..47492e38c2 100644
--- a/esphome/components/ld2420/binary_sensor/ld2420_binary_sensor.h
+++ b/esphome/components/ld2420/binary_sensor/ld2420_binary_sensor.h
@@ -5,7 +5,7 @@
 
 namespace esphome::ld2420 {
 
-class LD2420BinarySensor : public LD2420Listener, public Component, binary_sensor::BinarySensor {
+class LD2420BinarySensor final : public LD2420Listener, public Component, public binary_sensor::BinarySensor {
  public:
   void dump_config() override;
   void set_presence_sensor(binary_sensor::BinarySensor *bsensor) { this->presence_bsensor_ = bsensor; };
diff --git a/esphome/components/ld2420/button/reconfig_buttons.h b/esphome/components/ld2420/button/reconfig_buttons.h
index 72171ef386..b769e18a46 100644
--- a/esphome/components/ld2420/button/reconfig_buttons.h
+++ b/esphome/components/ld2420/button/reconfig_buttons.h
@@ -5,7 +5,7 @@
 
 namespace esphome::ld2420 {
 
-class LD2420ApplyConfigButton : public button::Button, public Parented<LD2420Component> {
+class LD2420ApplyConfigButton final : public button::Button, public Parented<LD2420Component> {
  public:
   LD2420ApplyConfigButton() = default;
 
@@ -13,7 +13,7 @@ class LD2420ApplyConfigButton : public button::Button, public Parented<LD2420Com
   void press_action() override;
 };
 
-class LD2420RevertConfigButton : public button::Button, public Parented<LD2420Component> {
+class LD2420RevertConfigButton final : public button::Button, public Parented<LD2420Component> {
  public:
   LD2420RevertConfigButton() = default;
 
@@ -21,7 +21,7 @@ class LD2420RevertConfigButton : public button::Button, public Parented<LD2420Co
   void press_action() override;
 };
 
-class LD2420RestartModuleButton : public button::Button, public Parented<LD2420Component> {
+class LD2420RestartModuleButton final : public button::Button, public Parented<LD2420Component> {
  public:
   LD2420RestartModuleButton() = default;
 
@@ -29,7 +29,7 @@ class LD2420RestartModuleButton : public button::Button, public Parented<LD2420C
   void press_action() override;
 };
 
-class LD2420FactoryResetButton : public button::Button, public Parented<LD2420Component> {
+class LD2420FactoryResetButton final : public button::Button, public Parented<LD2420Component> {
  public:
   LD2420FactoryResetButton() = default;
 
diff --git a/esphome/components/ld2420/ld2420.h b/esphome/components/ld2420/ld2420.h
index 358793fe64..ae44b16065 100644
--- a/esphome/components/ld2420/ld2420.h
+++ b/esphome/components/ld2420/ld2420.h
@@ -40,7 +40,7 @@ class LD2420Listener {
   virtual void on_fw_version(std::string &fw){};
 };
 
-class LD2420Component : public Component, public uart::UARTDevice {
+class LD2420Component final : public Component, public uart::UARTDevice {
  public:
   struct CmdFrameT {
     uint32_t header{0};
diff --git a/esphome/components/ld2420/number/gate_config_number.h b/esphome/components/ld2420/number/gate_config_number.h
index 8a8b9c61b1..e1c12e023a 100644
--- a/esphome/components/ld2420/number/gate_config_number.h
+++ b/esphome/components/ld2420/number/gate_config_number.h
@@ -5,7 +5,7 @@
 
 namespace esphome::ld2420 {
 
-class LD2420TimeoutNumber : public number::Number, public Parented<LD2420Component> {
+class LD2420TimeoutNumber final : public number::Number, public Parented<LD2420Component> {
  public:
   LD2420TimeoutNumber() = default;
 
@@ -13,7 +13,7 @@ class LD2420TimeoutNumber : public number::Number, public Parented<LD2420Compone
   void control(float timeout) override;
 };
 
-class LD2420MinDistanceNumber : public number::Number, public Parented<LD2420Component> {
+class LD2420MinDistanceNumber final : public number::Number, public Parented<LD2420Component> {
  public:
   LD2420MinDistanceNumber() = default;
 
@@ -21,7 +21,7 @@ class LD2420MinDistanceNumber : public number::Number, public Parented<LD2420Com
   void control(float min_gate) override;
 };
 
-class LD2420MaxDistanceNumber : public number::Number, public Parented<LD2420Component> {
+class LD2420MaxDistanceNumber final : public number::Number, public Parented<LD2420Component> {
  public:
   LD2420MaxDistanceNumber() = default;
 
@@ -29,7 +29,7 @@ class LD2420MaxDistanceNumber : public number::Number, public Parented<LD2420Com
   void control(float max_gate) override;
 };
 
-class LD2420GateSelectNumber : public number::Number, public Parented<LD2420Component> {
+class LD2420GateSelectNumber final : public number::Number, public Parented<LD2420Component> {
  public:
   LD2420GateSelectNumber() = default;
 
@@ -37,7 +37,7 @@ class LD2420GateSelectNumber : public number::Number, public Parented<LD2420Comp
   void control(float gate_select) override;
 };
 
-class LD2420MoveSensFactorNumber : public number::Number, public Parented<LD2420Component> {
+class LD2420MoveSensFactorNumber final : public number::Number, public Parented<LD2420Component> {
  public:
   LD2420MoveSensFactorNumber() = default;
 
@@ -45,7 +45,7 @@ class LD2420MoveSensFactorNumber : public number::Number, public Parented<LD2420
   void control(float move_factor) override;
 };
 
-class LD2420StillSensFactorNumber : public number::Number, public Parented<LD2420Component> {
+class LD2420StillSensFactorNumber final : public number::Number, public Parented<LD2420Component> {
  public:
   LD2420StillSensFactorNumber() = default;
 
@@ -53,7 +53,7 @@ class LD2420StillSensFactorNumber : public number::Number, public Parented<LD242
   void control(float still_factor) override;
 };
 
-class LD2420StillThresholdNumbers : public number::Number, public Parented<LD2420Component> {
+class LD2420StillThresholdNumbers final : public number::Number, public Parented<LD2420Component> {
  public:
   LD2420StillThresholdNumbers() = default;
   LD2420StillThresholdNumbers(uint8_t gate);
@@ -63,7 +63,7 @@ class LD2420StillThresholdNumbers : public number::Number, public Parented<LD242
   void control(float still_threshold) override;
 };
 
-class LD2420MoveThresholdNumbers : public number::Number, public Parented<LD2420Component> {
+class LD2420MoveThresholdNumbers final : public number::Number, public Parented<LD2420Component> {
  public:
   LD2420MoveThresholdNumbers() = default;
   LD2420MoveThresholdNumbers(uint8_t gate);
diff --git a/esphome/components/ld2420/select/operating_mode_select.h b/esphome/components/ld2420/select/operating_mode_select.h
index c1b8e0b11b..e5eb5d82bd 100644
--- a/esphome/components/ld2420/select/operating_mode_select.h
+++ b/esphome/components/ld2420/select/operating_mode_select.h
@@ -5,7 +5,7 @@
 
 namespace esphome::ld2420 {
 
-class LD2420Select : public Component, public select::Select, public Parented<LD2420Component> {
+class LD2420Select final : public Component, public select::Select, public Parented<LD2420Component> {
  public:
   LD2420Select() = default;
 
diff --git a/esphome/components/ld2420/sensor/ld2420_sensor.h b/esphome/components/ld2420/sensor/ld2420_sensor.h
index 4849cfa047..4ccfc19081 100644
--- a/esphome/components/ld2420/sensor/ld2420_sensor.h
+++ b/esphome/components/ld2420/sensor/ld2420_sensor.h
@@ -5,7 +5,7 @@
 
 namespace esphome::ld2420 {
 
-class LD2420Sensor : public LD2420Listener, public Component, sensor::Sensor {
+class LD2420Sensor final : public LD2420Listener, public Component, public sensor::Sensor {
  public:
   void dump_config() override;
   void set_distance_sensor(sensor::Sensor *sensor) { this->distance_sensor_ = sensor; }
diff --git a/esphome/components/ld2420/text_sensor/ld2420_text_sensor.h b/esphome/components/ld2420/text_sensor/ld2420_text_sensor.h
index 1932eaaf69..da295fe7ca 100644
--- a/esphome/components/ld2420/text_sensor/ld2420_text_sensor.h
+++ b/esphome/components/ld2420/text_sensor/ld2420_text_sensor.h
@@ -5,7 +5,7 @@
 
 namespace esphome::ld2420 {
 
-class LD2420TextSensor : public LD2420Listener, public Component, text_sensor::TextSensor {
+class LD2420TextSensor final : public LD2420Listener, public Component, public text_sensor::TextSensor {
  public:
   void dump_config() override;
   void set_fw_version_text_sensor(text_sensor::TextSensor *tsensor) { this->fw_version_text_sensor_ = tsensor; };