diff --git a/CMakeLists.txt b/CMakeLists.txt
index fe7b9dc..20d7c0c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,4 +5,10 @@ set(CMAKE_CXX_STANDARD 26)
 
 add_executable(Sim_C__
         src/main.cpp
+        src/model/Community.cpp
+        src/model/Community.h
+        src/model/building/Building.cpp
+        src/model/building/Building.h
+        src/model/Energy_Tariff.cpp
+        src/model/Energy_Tariff.h
 )
diff --git a/src/model/Community.cpp b/src/model/Community.cpp
new file mode 100644
index 0000000..aa89adf
--- /dev/null
+++ b/src/model/Community.cpp
@@ -0,0 +1,26 @@
+#include "Community.h"
+
+std::string Community::name() const {
+    return Name;
+}
+
+void Community::set_name(const std::string& name) {
+    Name = name;
+}
+
+std::vector<std::unique_ptr<Building::Base>>& Community::buildings() {
+    return Buildings;
+}
+
+// Use move semantics for efficiency
+void Community::set_buildings(std::vector<std::unique_ptr<Building::Base>> buildings) {
+    Buildings = std::move(buildings);
+}
+
+Energy_Tariff Community::energy_tariff() const {
+    return energy_Tariff;
+}
+
+void Community::set_energy_tariff(const Energy_Tariff& energy_tariff) {
+    energy_Tariff = energy_tariff;
+}
diff --git a/src/model/Community.h b/src/model/Community.h
new file mode 100644
index 0000000..2861d94
--- /dev/null
+++ b/src/model/Community.h
@@ -0,0 +1,36 @@
+//
+// Created by Stani on 09/03/2025.
+//
+
+#ifndef COMMUNITY_H
+#define COMMUNITY_H
+#include <memory>
+#include <vector>
+
+#include "building/Building.h"
+#include "Energy_Tariff.h"
+
+
+class Community {
+public:
+    std::string name() const;
+
+    void set_name(const std::string &name);
+
+    std::vector<std::unique_ptr<Building::Base>>& buildings();
+
+    void set_buildings(std::vector<std::unique_ptr<Building::Base>> buildings);
+
+    Energy_Tariff energy_tariff() const;
+
+    void set_energy_tariff(const Energy_Tariff &energy_tariff);
+
+private:
+    std::string Name;
+    std::vector<std::unique_ptr<Building::Base>> Buildings;
+    Energy_Tariff  energy_Tariff;
+};
+
+
+
+#endif //COMMUNITY_H
diff --git a/src/model/Energy_Tariff.cpp b/src/model/Energy_Tariff.cpp
new file mode 100644
index 0000000..8bcebcf
--- /dev/null
+++ b/src/model/Energy_Tariff.cpp
@@ -0,0 +1,5 @@
+//
+// Created by Stani on 09/03/2025.
+//
+
+#include "Energy_Tariff.h"
diff --git a/src/model/Energy_Tariff.h b/src/model/Energy_Tariff.h
new file mode 100644
index 0000000..2f2056f
--- /dev/null
+++ b/src/model/Energy_Tariff.h
@@ -0,0 +1,16 @@
+//
+// Created by Stani on 09/03/2025.
+//
+
+#ifndef ENERGY_TARIFF_H
+#define ENERGY_TARIFF_H
+
+
+
+class Energy_Tariff {
+
+};
+
+
+
+#endif //ENERGY_TARIFF_H
diff --git a/src/model/building/Building.cpp b/src/model/building/Building.cpp
new file mode 100644
index 0000000..4792c6d
--- /dev/null
+++ b/src/model/building/Building.cpp
@@ -0,0 +1,150 @@
+//
+// Created by Stani on 09/03/2025.
+//
+
+#include "Building.h"
+
+float Building::Cost::special_rate_consumption() const {
+    return SpecialRateConsumption;
+}
+
+void Building::Cost::set_special_rate_consumption(float special_rate_consumption) {
+    SpecialRateConsumption = special_rate_consumption;
+}
+
+float Building::Cost::special_rate_generation() const {
+    return SpecialRateGeneration;
+}
+
+void Building::Cost::set_special_rate_generation(float special_rate_generation) {
+    SpecialRateGeneration = special_rate_generation;
+}
+
+std::vector<std::unique_ptr<float>>& Building::Simulation_Values::community_coverage() {
+    return CommunityCoverage;
+}
+
+void Building::Simulation_Values::
+set_community_coverage(std::vector<std::unique_ptr<float>> community_coverage) {
+    CommunityCoverage = std::move(community_coverage);
+}
+
+std::vector<std::unique_ptr<float>>& Building::Simulation_Values::own_usage() {
+    return OwnUsage;
+}
+
+void Building::Simulation_Values::set_own_usage(std::vector<std::unique_ptr<float>> own_usage) {
+    OwnUsage = std::move(own_usage) ;
+}
+
+std::vector<std::unique_ptr<float>>& Building::Simulation_Values::needed_con() {
+    return Needed_con;
+}
+
+void Building::Simulation_Values::set_needed_con(std::vector<std::unique_ptr<float>> needed_con) {
+    Needed_con = std::move(needed_con) ;
+}
+
+std::vector<std::unique_ptr<float>>& Building::Simulation_Values::needed_gen() {
+    return NeededGen;
+}
+
+void Building::Simulation_Values::set_needed_gen(std::vector<std::unique_ptr<float>> needed_gen) {
+    NeededGen = std::move(needed_gen);
+}
+
+std::string Building::Metadata::name() const {
+    return Name;
+}
+
+void Building::Metadata::set_name(const std::string &name) {
+    Name =  name;
+}
+
+float Building::Metadata::annual_consumption() const {
+    return AnnualConsumption;
+}
+
+void Building::Metadata::set_annual_consumption(float annual_consumption) {
+    AnnualConsumption = annual_consumption;
+}
+
+float Building::Metadata::annual_generation() const {
+    return AnnualGeneration;
+}
+
+void Building::Metadata::set_annual_generation(float annual_generation) {
+    AnnualGeneration = annual_generation;
+}
+
+std::vector<std::unique_ptr<float>>& Building::Metadata::consumption_profile() {
+    return ConsumptionProfile;
+}
+
+void Building::Metadata::set_consumption_profile(std::vector<std::unique_ptr<float>> consumption_profile) {
+    ConsumptionProfile = std::move(consumption_profile);
+}
+
+std::vector<std::unique_ptr<float>>& Building::Metadata::generation_profile() {
+    return GenerationProfile;
+}
+
+void Building::Metadata::set_generation_profile(std::vector<std::unique_ptr<float>> generation_profile) {
+    GenerationProfile = std::move(generation_profile);
+}
+
+std::string Building::Metadata::consumption_profile_name() const {
+    return ConsumptionProfileName;
+}
+
+void Building::Metadata::set_consumption_profile_name(const std::string &consumption_profile_name) {
+    ConsumptionProfileName = consumption_profile_name;
+}
+
+std::string Building::Metadata::generation_profile_name() const {
+    return GenerationProfileName;
+}
+
+void Building::Metadata::set_generation_profile_name(const std::string &generation_profile_name) {
+    GenerationProfileName = generation_profile_name;
+}
+
+short Building::Metadata::connection_power() const {
+    return ConnectionPower;
+}
+
+void Building::Metadata::set_connection_power(short connection_power) {
+    ConnectionPower = connection_power;
+}
+
+short Building::Metadata::grid_power() const {
+    return GridPower;
+}
+
+void Building::Metadata::set_grid_power(short grid_power) {
+    GridPower = grid_power;
+}
+
+std::unique_ptr<Building::Cost>& Building::Base::cost() {
+    return Cost;
+}
+
+void Building::Base::set_cost(std::unique_ptr<Building::Cost>  &cost) {
+    Cost = std::move(cost);
+}
+
+std::unique_ptr<Building::Simulation_Values>& Building::Base::values() {
+    return Values;
+}
+
+void Building::Base::set_values(std::unique_ptr<Simulation_Values>  &values) {
+    Values = std::move(values);
+}
+
+std::unique_ptr<Building::Metadata>& Building::Base::metadata() {
+    return Metadata;
+}
+
+void Building::Base::set_metadata(std::unique_ptr<Building::Metadata>  &metadata) {
+    Metadata = std::move(metadata);
+}
diff --git a/src/model/building/Building.h b/src/model/building/Building.h
new file mode 100644
index 0000000..cb599ab
--- /dev/null
+++ b/src/model/building/Building.h
@@ -0,0 +1,86 @@
+    //
+    // Created by Stani on 09/03/2025.
+    //
+
+    #ifndef BUILDING_H
+    #define BUILDING_H
+    #include <memory>
+    #include <vector>
+
+
+    namespace Building {
+        class Cost {
+        private:
+            float SpecialRateConsumption;
+            float SpecialRateGeneration;
+        public:
+            float special_rate_consumption() const;
+            void set_special_rate_consumption(float special_rate_consumption);
+            float special_rate_generation() const;
+            void set_special_rate_generation(float special_rate_generation);
+        };
+        class Simulation_Values {
+        private:
+            std::vector<std::unique_ptr<float>> CommunityCoverage;
+            std::vector<std::unique_ptr<float>> OwnUsage;
+            std::vector<std::unique_ptr<float>> Needed_con;
+            std::vector<std::unique_ptr<float>> NeededGen;
+        public:
+            std::vector<std::unique_ptr<float>>& community_coverage();
+            void set_community_coverage(std::vector<std::unique_ptr<float>> community_coverage);
+            std::vector<std::unique_ptr<float>>& own_usage();
+            void set_own_usage(std::vector<std::unique_ptr<float>> own_usage);
+            std::vector<std::unique_ptr<float>>& needed_con();
+            void set_needed_con(std::vector<std::unique_ptr<float>> needed_con);
+            std::vector<std::unique_ptr<float>>& needed_gen();
+            void set_needed_gen(std::vector<std::unique_ptr<float>> needed_gen);
+        };
+        class Metadata {
+        private:
+            std::string Name;
+            float AnnualConsumption;
+            float AnnualGeneration;
+            std::vector<std::unique_ptr<float>> ConsumptionProfile;
+            std::vector<std::unique_ptr<float>> GenerationProfile;
+            std::string ConsumptionProfileName;
+            std::string GenerationProfileName;
+            short ConnectionPower;
+            short GridPower;
+        public:
+            std::string name() const;
+            void set_name(const std::string &name);
+            float annual_consumption() const;
+            void set_annual_consumption(float annual_consumption);
+            float annual_generation() const;
+            void set_annual_generation(float annual_generation);
+            std::vector<std::unique_ptr<float>>& consumption_profile();
+            void set_consumption_profile(std::vector<std::unique_ptr<float>> consumption_profile);
+            std::vector<std::unique_ptr<float>>& generation_profile();
+            void set_generation_profile(std::vector<std::unique_ptr<float>> generation_profile);
+            std::string consumption_profile_name() const;
+            void set_consumption_profile_name(const std::string &consumption_profile_name);
+            std::string generation_profile_name() const;
+            void set_generation_profile_name(const std::string &generation_profile_name);
+            short connection_power() const;
+            void set_connection_power(short connection_power);
+            short grid_power() const;
+            void set_grid_power(short grid_power);
+        };
+
+        class Base {
+        private:
+            std::unique_ptr<Cost> Cost;
+            std::unique_ptr<Simulation_Values> Values;
+            std::unique_ptr<Metadata> Metadata;
+        public:
+            std::unique_ptr<Building::Cost>& cost();
+            void set_cost(std::unique_ptr<Building::Cost> &cost);
+            std::unique_ptr<Simulation_Values> & values();
+            void set_values(std::unique_ptr<Simulation_Values>  &values);
+            std::unique_ptr<Building::Metadata> & metadata();
+            void set_metadata(std::unique_ptr<Building::Metadata>  &metadata);
+        };
+    }
+
+
+    #endif //BUILDING_H