diff --git a/.idea/terraform.xml b/.idea/terraform.xml
new file mode 100644
index 00000000..cd46a3d3
--- /dev/null
+++ b/.idea/terraform.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="TerraformProjectSettings">
+    <option name="toolPath" value="/opt/homebrew/bin/terraform" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/asset_list/AssetList.py b/asset_list/AssetList.py
index fde24fe2..e61cc89b 100644
--- a/asset_list/AssetList.py
+++ b/asset_list/AssetList.py
@@ -1,16 +1,200 @@
+import os
 import re
+from datetime import datetime
+from openai import OpenAI
+import tiktoken
+import numpy as np
 import pandas as pd
+from fuzzywuzzy import process
 from utils.logger import setup_logger
 from backend.SearchEpc import SearchEpc
+import asset_list.mappings.property_type as property_type_mappings
+import asset_list.mappings.walls as walls_mappings
+import asset_list.mappings.heating_systems as heating_mappings
+import asset_list.mappings.exising_pv as existing_pv_mappings
 
 logger = setup_logger()
 
+# OpenAI API Key (set this in your environment variables for security)
+OPENAI_API_KEY = os.environ.get("OPENAI_API_KEY")
+
+
+class DataRemapper:
+    def __init__(self, standard_values, standard_map=None, max_tokens=1000):
+        """
+        Initialize the remapper with standard values and a predefined mapping.
+
+        :param standard_values: Set of allowed standardized values.
+        :param standard_map: Dictionary of common remappings {raw_value: standard_value}.
+        """
+        self.standard_values = {v.lower() for v in standard_values}  # Normalize to lowercase
+        self.standard_map = {k.lower(): v.lower() for k, v in (standard_map or {}).items()}  # Predefined mappings
+        self.fuzzy_threshold = 90  # Adjust fuzzy matching sensitivity
+        self.ai_model = "gpt-4-turbo"  # Use gpt-3.5-turbo for cheaper processing
+
+        # Tokenizer for counting tokens
+        self.tokenizer = tiktoken.encoding_for_model(self.ai_model)
+
+        # Track token usage and remap dictionary
+        self.total_tokens_used = 0
+        self.total_cost = 0
+        self.remap_dict = {}  # {original_value: standardized_value}
+        self.max_tokens = 1000  # Limit for OpenAI API
+
+        # Memoization for AI calls
+        self.ai_cache = {}  # {tuple(unmapped_values): {original_value: standardized_value}}
+        # Capture the reponse for debugging
+        self.ai_response = None
+
+        # OpenAI pricing (as of Feb 2024)
+        self.pricing = {
+            "gpt-4-turbo": {"input": 0.01 / 1000, "output": 0.03 / 1000},
+            "gpt-3.5-turbo": {"input": 0.0015 / 1000, "output": 0.002 / 1000},
+        }
+
+        self.openai_client = OpenAI(api_key=OPENAI_API_KEY)
+
+    @staticmethod
+    def clean_string(text):
+        """Basic text cleaning: remove extra spaces, punctuation, and normalize case."""
+        if not isinstance(text, str):
+            return None
+        text = text.strip().lower()
+        text = re.sub(r'[^\w\s]', '', text)  # Remove punctuation
+        return text
+
+    def fuzzy_match(self, text):
+        """Use fuzzy matching to find the closest standard value."""
+        match, score = process.extractOne(text, self.standard_values) if text else (None, 0)
+        return match if score >= self.fuzzy_threshold else None
+
+    def count_tokens(self, text):
+        """Estimate the number of tokens in a given text."""
+        return len(self.tokenizer.encode(text)) if text else 0
+
+    def ai_standardize(self, unmapped_values):
+        """Call OpenAI API **once** for all unmapped values to minimize cost, with memoization."""
+        if not unmapped_values:
+            return {}
+
+        unmapped_tuple = tuple(sorted(unmapped_values))  # Ensure consistency for memoization
+        if unmapped_tuple in self.ai_cache:
+            return self.ai_cache[unmapped_tuple]  # Return memoized result
+
+        prompt = f"""
+        You are an expert in data classification. Standardize each of these values into one of the categories: 
+        {list(self.standard_values)}. 
+
+        Return only a JSON dictionary where:
+        - The keys are the original values.
+        - The values are the standardized ones.
+
+        Strictly return JSON **without markdown formatting** or extra text.
+
+        Example Output:
+        {{
+            "BLKHOUS": "block house",
+            "BEDSIT": "bedsit"
+        }}
+
+        Values to standardize:
+        {unmapped_values}
+        """
+
+        # Count input tokens
+        input_tokens = self.count_tokens(prompt)
+        if input_tokens > self.max_tokens:
+            raise ValueError("Input tokens exceed the maximum limit.")
+
+        response = self.openai_client.chat.completions.create(
+            model=self.ai_model,
+            messages=[{"role": "user", "content": prompt}],
+            max_tokens=self.max_tokens,
+            temperature=0.1,
+        )
+
+        output_text = response.choices[0].message.content.strip()
+        output_tokens = self.count_tokens(output_text)  # Count output tokens
+
+        # Track total token usage
+        self.total_tokens_used += input_tokens + output_tokens
+
+        # Estimate cost
+        input_cost = input_tokens * self.pricing[self.ai_model]["input"]
+        output_cost = output_tokens * self.pricing[self.ai_model]["output"]
+        self.total_cost += input_cost + output_cost
+
+        try:
+            # Parse response as dictionary
+            mapping = eval(output_text)  # OpenAI should return a valid dictionary
+        except:
+            mapping = {val: "unknown" for val in unmapped_values}  # Fallback
+
+        # Memoize the AI response
+        self.ai_cache[unmapped_tuple] = mapping
+        # We store the raw AI response for debugging
+        logger.debug(f"AI Response: {mapping}")
+        self.ai_response = output_text
+
+        return mapping
+
+    def standardize_list(self, values_to_remap):
+        """
+        Standardizes a list of values and returns a dictionary {original_value: standardized_value}.
+
+        :param values_to_remap: List of raw values to standardize.
+        :return: Dictionary {original_value: standardized_value}.
+        """
+        unique_values = set(values_to_remap)  # Process only unique values
+
+        unmapped_values = []
+        for value in unique_values:
+            if pd.isna(value):  # Handle NaN values
+                self.remap_dict[value] = "unknown"
+                continue
+
+            cleaned_value = self.clean_string(value)
+
+            # Rule-Based Check (Predefined Mapping)
+            if cleaned_value in self.standard_map:
+                self.remap_dict[value] = self.standard_map[cleaned_value]
+                continue
+
+            # Exact Match in Standard Values
+            if cleaned_value in self.standard_values:
+                self.remap_dict[value] = cleaned_value
+                continue
+
+            # Fuzzy Matching
+            fuzzy_match = self.fuzzy_match(cleaned_value)
+            if fuzzy_match:
+                self.remap_dict[value] = fuzzy_match
+                continue
+
+            # Capture anything that wasn't mapped
+            unmapped_values.append(value)
+
+        # AI Model - remap anything unmapped (batch request)
+        ai_mapping = self.ai_standardize(unmapped_values)
+        self.remap_dict.update(ai_mapping)
+
+        return self.remap_dict
+
+    def report_usage(self):
+        """Prints a summary of token usage and cost."""
+        print(f"\n🔹 Total Tokens Used: {self.total_tokens_used}")
+        print(f"💰 Estimated Cost: ${self.total_cost:.4f}")
+
 
 class AssetList:
     """
     This class is used to standardise asset lists so that we can process the core information in a consistent manner.
     """
 
+    DATETIME_REMAP = {
+        "Pre 1900": datetime(year=1899, month=12, day=31),
+    }
+
     # These are the accepted methods we have for cleaning the address1 column
     ADDRESS_1_CLEANING_METHODS = [
         "first_two_words",  # This method will split on the fist two words, where the separator is a space
@@ -19,15 +203,6 @@ class AssetList:
         # "address1_extraction"  # This method will use the NLP model to extract address1
     ]
 
-    STANDARD_PROPERTY_TYPES = [
-        "house",
-        "flat",
-        "bungalow",
-        "maisonette",
-        "park home",
-        "block house",
-    ]
-
     # Standard column Names
     STANDARD_ADDRESS_1 = "domna_address_1"
     STANDARD_POSTCODE = "domna_postcode"
@@ -44,6 +219,15 @@ class AssetList:
     # Regular expression for identifying if the address might point to multiple units
     MULTI_UNIT_REGEX = re.compile(r'\b([A-Za-z0-9]+)-([A-Za-z0-9]+)\b')
 
+    # List of columns relating to the non-intrusive data
+    NON_INTRUSIVES_COLNAMES = [
+        "Archetype", "Construction", "Insulated", "Material", "CIGA Check Required",
+        "PV, ACCESS ISSUE, SEE NOTES", "OFF GAS - ROOF ORIENTATION",
+        "Any further surveyor notes", 'Surveyors Name'
+    ]
+
+    #### Mapping for wall construction
+
     def __init__(
         self,
         local_filepath,
@@ -96,6 +280,8 @@ class AssetList:
             "existing_pv": None
         }
 
+        self.variable_mappings = {}
+
     def _extract_address1(self, asset_list, full_address_col, postcode_col, method="first_two_words"):
 
         if method not in self.ADDRESS_1_CLEANING_METHODS:
@@ -149,7 +335,7 @@ class AssetList:
             # We look for string in the form (x-y)
             return bool(cls.MULTI_UNIT_REGEX.search(address1_section))
 
-    def standardise(self):
+    def init_standardise(self):
         """
         This function is used to standardise the asset list
         :return: standardised asset list
@@ -202,19 +388,110 @@ class AssetList:
         self.create_property_id()
 
         # We keep just the columns we care about and will work through the various columns and standardise
-        self.standardised_asset_list = self.standardised_asset_list[
-            [
-                self.landlord_property_id,
-                self.DOMNA_PROPERTY_ID,
-                self.address1_colname,
-                self.postcode_colname,
-                self.full_address_colname,
-                self.landlord_year_built,
-                self.landlord_uprn,
-                self.landlord_property_type,
-            ]
+        variables = [
+            self.landlord_property_id,
+            self.DOMNA_PROPERTY_ID,
+            self.address1_colname,
+            self.postcode_colname,
+            self.full_address_colname,
+            self.landlord_uprn,
+            self.landlord_property_type,
+            self.landlord_year_built,
+            self.landlord_wall_construction,
+            self.landlord_heating_system,
+            self.landlord_existing_pv
         ]
+        rename = {}
+
+        if self.non_intrusives_present:
+            variables += self.NON_INTRUSIVES_COLNAMES
+            rename = {
+                **rename,
+                **dict(
+                    zip(self.NON_INTRUSIVES_COLNAMES, ["non-intrusives: " + c for c in self.NON_INTRUSIVES_COLNAMES])
+                )
+            }
+
+        self.standardised_asset_list = self.standardised_asset_list[variables].rename(
+            columns=rename
+        )
 
         # We idenfiy addresses which are likely to be multi-addresses (i.g are rooms x-y)
+        self.standardised_asset_list["is_multi_address"] = self.standardised_asset_list[
+            self.full_address_colname
+        ].apply(lambda x: self._identify_multi_address(x))
 
-        raise NotImplementedError
+        # We handle cleaning for walls, in the instance that the landlord provides us with EPC data and
+        # we see instances of "average thermal transmittance" in the description
+        self.standardised_asset_list[self.landlord_wall_construction] = np.where(
+            self.standardised_asset_list[self.landlord_wall_construction].str.lower().str.contains(
+                "average thermal transmittance"
+            ),
+            "new build - average thermal transmittance",
+            self.standardised_asset_list[self.landlord_wall_construction]
+        )
+
+        # Clear our build year column
+
+        # We attempt to process the year built column
+        if self.landlord_year_built is not None:
+            # We check if we have a datetime
+            if isinstance(self.standardised_asset_list[self.landlord_year_built].iloc[0], datetime):
+                # We treat any string columns - with common values we see
+                self.standardised_asset_list[self.landlord_year_built] = (
+                    self.standardised_asset_list[self.landlord_year_built].replace(self.DATETIME_REMAP)
+                )
+
+                self.standardised_asset_list[self.landlord_year_built] = pd.to_datetime(
+                    self.standardised_asset_list[self.landlord_year_built]
+                )
+                # Convert this to year
+                self.standardised_asset_list[self.landlord_year_built] = (
+                    self.standardised_asset_list[self.landlord_year_built].dt.year
+                )
+            else:
+                raise NotImplementedError("Year built column must be a datetime - implement me")
+
+        # We now create standard lookups
+        to_remap = {
+            self.landlord_property_type: {
+                "standard_values": property_type_mappings.STANDARD_PROPERTY_TYPES,
+                "standard_map": property_type_mappings.PROPERTY_MAPPING
+            },
+            self.landlord_wall_construction: {
+                "standard_values": walls_mappings.STANDARD_WALL_CONSTRUCTIONS,
+                "standard_map": walls_mappings.WALL_CONSTRUCTION_MAPPINGS
+            },
+            self.landlord_heating_system: {
+                "standard_values": heating_mappings.STANDARD_HEATING_SYSTEMS,
+                "standard_map": heating_mappings.HEATING_MAPPINGS
+            },
+            self.landlord_existing_pv: {
+                "standard_values": existing_pv_mappings.STANDARD_EXISTING_PV,
+                "standard_map": existing_pv_mappings.EXISTING_PV_MAPPINGS
+            }
+        }
+
+        for variable, config in to_remap.items():
+            logger.info("Standardising variable: %s", variable)
+            values_to_remap = self.standardised_asset_list[variable].unique()
+            # We want to map this to our standardised list of property types we're interested in
+            remapper = DataRemapper(standard_values=config["standard_values"], standard_map=config["standard_map"])
+            remap_dictionary = remapper.standardize_list(values_to_remap=values_to_remap.tolist())
+            self.variable_mappings[variable] = remap_dictionary
+
+        # We now print out the variable mappings, which can be reviewed by the user, before the final standardised
+        # asset list is returned
+
+    def apply_standardiation(self, override_empty_mappings=False):
+        """
+        This function applies the standardisation to the asset list
+        :param override_empty_mappings: If true, will override the check for empty mappings. This is only relevant
+        if there are no categories which need remapping which is highly unlikely
+        :return:
+        """
+        if not self.variable_mappings and not override_empty_mappings:
+            raise ValueError("Please run init_standardise first")
+
+    def create_lookup_mappings(self):
+        pass
diff --git a/asset_list/app.py b/asset_list/app.py
new file mode 100644
index 00000000..21b405d8
--- /dev/null
+++ b/asset_list/app.py
@@ -0,0 +1 @@
+import os
diff --git a/asset_list/mappings/exising_pv.py b/asset_list/mappings/exising_pv.py
new file mode 100644
index 00000000..1e45bd83
--- /dev/null
+++ b/asset_list/mappings/exising_pv.py
@@ -0,0 +1,8 @@
+STANDARD_EXISTING_PV = {
+    "already has PV", "no PV", "unknown"
+}
+
+EXISTING_PV_MAPPINGS = {
+    "NO": "no PV",
+    "YES": "already has PV",
+}
diff --git a/asset_list/mappings/heating_systems.py b/asset_list/mappings/heating_systems.py
new file mode 100644
index 00000000..4fce39ab
--- /dev/null
+++ b/asset_list/mappings/heating_systems.py
@@ -0,0 +1,46 @@
+STANDARD_HEATING_SYSTEMS = {
+    "gas combi boiler",
+    "electric storage heaters",
+    "district heating",
+    "gas condensing boiler",
+    "oil boiler",
+    "gas condensing combi",
+    "air source heat pump",
+    "boiler - other fuel",
+    "ground source heat pump",
+    "electric radiators",
+    "other",
+    "electric boiler",
+    "unknown",
+    "communal gas boiler",
+}
+
+HEATING_MAPPINGS = {
+    "Combi - GAS": "gas combi boiler",
+    "E7 Storage Heaters": "electric storage heaters",
+    "District heating system": "district heating",
+    "Condensing Boiler - GAS": "gas condensing boiler",
+    "Boiler Oil/other": "oil boiler",
+    "Condensing Combi - Gas": "gas condensing combi",
+    "Air Source Source Heat Pump": "air source heat pump",
+    "Biomass Boiler": "boiler - other fuel",
+    "Ground Source Heat Pump": "ground source heat pump",
+    "Electric Oil filled radiators": "electric radiators",
+    "Solid Fuel": "other",
+    "LPG Boiler": "boiler - other fuel",
+    "Electric Boiler": "electric boiler",
+    "No data": "unknown",
+    "Boiler Communal/Commercial - GAS": "communal gas boiler",
+    "Eco Electric Radiators": "electric radiators",
+    "Gas fire": "other",
+    "Backboiler - Solid fuel": "other",
+}
+
+# array(['Combi - GAS', 'E7 Storage Heaters', 'District heating system',
+#        'Condensing Boiler - GAS', 'Boiler Oil/other',
+#        'Condensing Combi - Gas', 'Air Source Source Heat Pump',
+#        'Biomass Boiler', 'Ground Source Heat Pump',
+#        'Electric Oil filled radiators', 'Solid Fuel', 'LPG Boiler',
+#        'Electric Boiler', 'No data', 'Boiler Communal/Commercial - GAS',
+#        'Eco Electric Radiators', 'Gas fire', 'Backboiler - Solid fuel'],
+#       dtype=object)
diff --git a/asset_list/mappings/property_type.py b/asset_list/mappings/property_type.py
new file mode 100644
index 00000000..bcad9ede
--- /dev/null
+++ b/asset_list/mappings/property_type.py
@@ -0,0 +1,16 @@
+# These are the standard categories for property types
+STANDARD_PROPERTY_TYPES = {
+    "house", "flat", "maisonette", "bungalow", "park home", "block house", "bedsit", "coach house",
+    "unknown", "other"
+}
+
+# This is a basic mapping that we use to map values that we've seen commonly to standard values
+PROPERTY_MAPPING = {
+    "HOUSE": "house",
+    "FLAT": "flat",
+    "MAISONET": "maisonette",
+    "BUNGALOW": "bungalow",
+    "BLKHOUS": "block house",
+    "BEDSIT": "bedsit",
+    "COACHSE": "coach house",
+}
diff --git a/asset_list/mappings/walls.py b/asset_list/mappings/walls.py
new file mode 100644
index 00000000..7dec7d12
--- /dev/null
+++ b/asset_list/mappings/walls.py
@@ -0,0 +1,38 @@
+STANDARD_WALL_CONSTRUCTIONS = {
+    "uninsulated cavity", "filled cavity", "partial insulated cavity", "timber frame", "solid brick",
+    "system built", "granite or whinstone", "other", "unknown", "sandstone or limestone", "cob",
+    "new build - average thermal transmittance",
+}
+
+WALL_CONSTRUCTION_MAPPINGS = {
+    "New Build - Average Thermal Transmittance": "new build - average thermal transmittance",
+    'Average thermal transmittance 0.25 W/m?K': 'unknown',
+    'Cavity wall, as built, insulated (assumed)': 'filled cavity',
+    'Average thermal transmittance 0.31 W/m?K': 'unknown',
+    'Cavity wall, as built, no insulation (assumed)': 'uninsulated cavity',
+    'Average thermal transmittance 0.30 W/m?K': 'unknown', 'Average thermal transmittance 0.28 W/m-¦K': 'unknown',
+    'Average thermal transmittance 0.25 W/m-¦K': 'unknown', 'Average thermal transmittance 0.21 W/m-¦K': 'unknown',
+    'Average thermal transmittance 0.20 W/m-¦K': 'unknown', 'Average thermal transmittance 0.29 W/m?K': 'unknown',
+    'Average thermal transmittance 0.16 W/m?K': 'unknown',
+    'Average thermal transmittance 0.27 W/m&#0178;K': 'unknown',
+    'Average thermal transmittance 0.15 W/m-¦K': 'unknown', 'Average thermal transmittance 0.23 W/m-¦K': 'unknown',
+    'Average thermal transmittance 0.18 W/m?K': 'unknown',
+    'Granite or whin, with internal insulation': 'granite or whinstone',
+    'Average thermal transmittance 0.22 W/m-¦K': 'unknown', 'Average thermal transmittance 0.24 W/m?K': 'unknown',
+    'Average thermal transmittance 0.16 W/m-¦K': 'unknown', 'Average thermal transmittance 0.35 W/m?K': 'unknown',
+    'Average thermal transmittance 0.26 W/m-¦K': 'unknown', 'Average thermal transmittance 0.62 W/m?K': 'unknown',
+    'Average thermal transmittance 0.64 W/m?K': 'unknown', 'Average thermal transmittance 0.61 W/m?K': 'unknown',
+    'Sandstone or limestone, as built, no insulation (assumed)': 'sandstone or limestone',
+    'Average thermal transmittance 0.33 W/m?K': 'unknown', 'Cavity wall,': 'unknown',
+    'Cavity wall, as built, partial insulation (assumed)': 'partial insulated cavity',
+    'Average thermal transmittance 0.29 W/m-¦K': 'unknown', 'Average thermal transmittance 0.32 W/m-¦K': 'unknown',
+    'Average thermal transmittance 0.19 W/m-¦K': 'unknown', 'Average thermal transmittance 0.27 W/m?K': 'unknown',
+    'Average thermal transmittance 0.22 W/m?K': 'unknown', 'Average thermal transmittance 0.38 W/m?K': 'unknown',
+    'Average thermal transmittance 0.26 W/m?K': 'unknown', 'Average thermal transmittance 0.27 W/m-¦K': 'unknown',
+    'Average thermal transmittance 0.18 W/m-¦K': 'unknown', 'Average thermal transmittance = 0.27 W/m?K': 'unknown',
+    'Cavity wall, with external insulation': 'filled cavity', 'Average thermal transmittance 0.21 W/m?K': 'unknown',
+    'Average thermal transmittance 0.23 W/m?K': 'unknown', 'Average thermal transmittance 0.20 W/m?K': 'unknown',
+    'Average thermal transmittance 0.32 W/m?K': 'unknown', 'Average thermal transmittance 0.24 W/m-¦K': 'unknown',
+    'Cavity wall, with internal insulation': 'filled cavity',
+    'Average thermal transmittance 0.17 W/m-¦K': 'unknown', 'Average thermal transmittance 0.28 W/m?K': 'unknown'
+}
diff --git a/asset_list/requirements.txt b/asset_list/requirements.txt
index d6d64471..0c16c43a 100644
--- a/asset_list/requirements.txt
+++ b/asset_list/requirements.txt
@@ -5,4 +5,6 @@ pydantic-settings==2.6.0
 epc-api-python==1.0.2
 fuzzywuzzy
 boto3
-openpyxl
\ No newline at end of file
+openpyxl
+openai
+tiktoken
\ No newline at end of file
diff --git a/etl/route_march_data_pull/app.py b/etl/route_march_data_pull/app.py
index fcf11765..ca5195d6 100644
--- a/etl/route_march_data_pull/app.py
+++ b/etl/route_march_data_pull/app.py
@@ -364,10 +364,11 @@ def app():
         landlord_heating_system="Heat Source",
         landlord_existing_pv="PV (Y/N)"
     )
-    self.standardised_asset_list(
-        # In here, we might want to pass some specific remaps
+    self.init_standardise(
     )
 
+    self.apply_transformations()
+
     # DATA_FOLDER = "/Users/khalimconn-kowlessar/Documents/hestia/Customers/Colchester"
     # DATA_FILENAME = "Warmfront data- Colchester Borough Homes (Complete).xlsx"
     # SHEET_NAME = "Sheet1"