diff --git a/esphome/components/network/ip_address.h b/esphome/components/network/ip_address.h
index 5e6b0dbd96..5ec6450cce 100644
--- a/esphome/components/network/ip_address.h
+++ b/esphome/components/network/ip_address.h
@@ -118,10 +118,10 @@ struct IPAddress {
   operator arduino_ns::IPAddress() const { return ip_addr_get_ip4_u32(&ip_addr_); }
 #endif
 
-  bool is_set() { return !ip_addr_isany(&ip_addr_); }  // NOLINT(readability-simplify-boolean-expr)
-  bool is_ip4() { return IP_IS_V4(&ip_addr_); }
-  bool is_ip6() { return IP_IS_V6(&ip_addr_); }
-  bool is_multicast() { return ip_addr_ismulticast(&ip_addr_); }
+  bool is_set() const { return !ip_addr_isany(&ip_addr_); }  // NOLINT(readability-simplify-boolean-expr)
+  bool is_ip4() const { return IP_IS_V4(&ip_addr_); }
+  bool is_ip6() const { return IP_IS_V6(&ip_addr_); }
+  bool is_multicast() const { return ip_addr_ismulticast(&ip_addr_); }
   std::string str() const { return str_lower_case(ipaddr_ntoa(&ip_addr_)); }
   bool operator==(const IPAddress &other) const { return ip_addr_cmp(&ip_addr_, &other.ip_addr_); }
   bool operator!=(const IPAddress &other) const { return !ip_addr_cmp(&ip_addr_, &other.ip_addr_); }
diff --git a/esphome/components/wifi/wifi_component.h b/esphome/components/wifi/wifi_component.h
index 713e6f223f..d37367b88c 100644
--- a/esphome/components/wifi/wifi_component.h
+++ b/esphome/components/wifi/wifi_component.h
@@ -426,7 +426,7 @@ class WiFiComponent : public Component {
   bool wifi_sta_pre_setup_();
   bool wifi_apply_output_power_(float output_power);
   bool wifi_apply_power_save_();
-  bool wifi_sta_ip_config_(optional<ManualIP> manual_ip);
+  bool wifi_sta_ip_config_(const optional<ManualIP> &manual_ip);
   bool wifi_apply_hostname_();
   bool wifi_sta_connect_(const WiFiAP &ap);
   void wifi_pre_setup_();
@@ -434,7 +434,7 @@ class WiFiComponent : public Component {
   bool wifi_scan_start_(bool passive);
 
 #ifdef USE_WIFI_AP
-  bool wifi_ap_ip_config_(optional<ManualIP> manual_ip);
+  bool wifi_ap_ip_config_(const optional<ManualIP> &manual_ip);
   bool wifi_start_ap_(const WiFiAP &ap);
 #endif  // USE_WIFI_AP
 
diff --git a/esphome/components/wifi/wifi_component_esp8266.cpp b/esphome/components/wifi/wifi_component_esp8266.cpp
index bcb5dc4cf7..b787446a39 100644
--- a/esphome/components/wifi/wifi_component_esp8266.cpp
+++ b/esphome/components/wifi/wifi_component_esp8266.cpp
@@ -117,7 +117,7 @@ void netif_set_addr(struct netif *netif, const ip4_addr_t *ip, const ip4_addr_t
 };
 #endif
 
-bool WiFiComponent::wifi_sta_ip_config_(optional<ManualIP> manual_ip) {
+bool WiFiComponent::wifi_sta_ip_config_(const optional<ManualIP> &manual_ip) {
   // enable STA
   if (!this->wifi_mode_(true, {}))
     return false;
@@ -730,7 +730,7 @@ void WiFiComponent::wifi_scan_done_callback_(void *arg, STATUS status) {
 }
 
 #ifdef USE_WIFI_AP
-bool WiFiComponent::wifi_ap_ip_config_(optional<ManualIP> manual_ip) {
+bool WiFiComponent::wifi_ap_ip_config_(const optional<ManualIP> &manual_ip) {
   // enable AP
   if (!this->wifi_mode_({}, true))
     return false;
diff --git a/esphome/components/wifi/wifi_component_esp_idf.cpp b/esphome/components/wifi/wifi_component_esp_idf.cpp
index fd7e85fb6b..824adb5cf5 100644
--- a/esphome/components/wifi/wifi_component_esp_idf.cpp
+++ b/esphome/components/wifi/wifi_component_esp_idf.cpp
@@ -487,7 +487,7 @@ bool WiFiComponent::wifi_sta_connect_(const WiFiAP &ap) {
   return true;
 }
 
-bool WiFiComponent::wifi_sta_ip_config_(optional<ManualIP> manual_ip) {
+bool WiFiComponent::wifi_sta_ip_config_(const optional<ManualIP> &manual_ip) {
   // enable STA
   if (!this->wifi_mode_(true, {}))
     return false;
@@ -884,7 +884,7 @@ bool WiFiComponent::wifi_scan_start_(bool passive) {
 }
 
 #ifdef USE_WIFI_AP
-bool WiFiComponent::wifi_ap_ip_config_(optional<ManualIP> manual_ip) {
+bool WiFiComponent::wifi_ap_ip_config_(const optional<ManualIP> &manual_ip) {
   esp_err_t err;
 
   // enable AP
diff --git a/esphome/components/wifi/wifi_component_libretiny.cpp b/esphome/components/wifi/wifi_component_libretiny.cpp
index 2946b9e831..eea7a7e933 100644
--- a/esphome/components/wifi/wifi_component_libretiny.cpp
+++ b/esphome/components/wifi/wifi_component_libretiny.cpp
@@ -68,7 +68,7 @@ bool WiFiComponent::wifi_sta_pre_setup_() {
   return true;
 }
 bool WiFiComponent::wifi_apply_power_save_() { return WiFi.setSleep(this->power_save_ != WIFI_POWER_SAVE_NONE); }
-bool WiFiComponent::wifi_sta_ip_config_(optional<ManualIP> manual_ip) {
+bool WiFiComponent::wifi_sta_ip_config_(const optional<ManualIP> &manual_ip) {
   // enable STA
   if (!this->wifi_mode_(true, {}))
     return false;
@@ -434,7 +434,7 @@ void WiFiComponent::wifi_scan_done_callback_() {
 }
 
 #ifdef USE_WIFI_AP
-bool WiFiComponent::wifi_ap_ip_config_(optional<ManualIP> manual_ip) {
+bool WiFiComponent::wifi_ap_ip_config_(const optional<ManualIP> &manual_ip) {
   // enable AP
   if (!this->wifi_mode_({}, true))
     return false;
diff --git a/esphome/components/wifi/wifi_component_pico_w.cpp b/esphome/components/wifi/wifi_component_pico_w.cpp
index 7025ba16bd..54f03f803d 100644
--- a/esphome/components/wifi/wifi_component_pico_w.cpp
+++ b/esphome/components/wifi/wifi_component_pico_w.cpp
@@ -72,7 +72,7 @@ bool WiFiComponent::wifi_sta_connect_(const WiFiAP &ap) {
 
 bool WiFiComponent::wifi_sta_pre_setup_() { return this->wifi_mode_(true, {}); }
 
-bool WiFiComponent::wifi_sta_ip_config_(optional<ManualIP> manual_ip) {
+bool WiFiComponent::wifi_sta_ip_config_(const optional<ManualIP> &manual_ip) {
   if (!manual_ip.has_value()) {
     return true;
   }
@@ -146,7 +146,7 @@ bool WiFiComponent::wifi_scan_start_(bool passive) {
 }
 
 #ifdef USE_WIFI_AP
-bool WiFiComponent::wifi_ap_ip_config_(optional<ManualIP> manual_ip) {
+bool WiFiComponent::wifi_ap_ip_config_(const optional<ManualIP> &manual_ip) {
   esphome::network::IPAddress ip_address, gateway, subnet, dns;
   if (manual_ip.has_value()) {
     ip_address = manual_ip->static_ip;