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Release 2.12

We have a few exciting updates to announce!

Here's the headlines:

1. You can now identify which properties have existing rooftop PV installations to support accurate baselining for your area. This can be found in the Domestic and Non-Domestic Rooftop PV Potential datasets, in the field titled ‘Solar Presence’.

2. We’ve released complete coverage for existing insulation, even where buildings lack a lodged Energy Performance Certificate, inferred by our data team to improve retrofit modelling and more accurate scenario results.

3. Understand why a property has been deemed unsuitable for a low carbon technology using the new ‘Remark’ field in our modelled datasets.

4. You’ll also notice a range of improvements in Data Stories, including the ability to add Portfolios results in an interactive map view.

Check out the details below:

Data updates: Heat Demand (Domestic and Non-Domestic)

Methodology updates:

  1. New source data: we now use inputs from Ordnance Survey’s National Geographic Database as well as some from Energy Performance Certificate records.

  2. New ‘Premise area’ and ‘Premise height’ figures are now used in our methodology to account for multi-occupancy dwellings.

  3. Building age classification is now used in our methodology, sourced from Ordnance Survey’s National Geographic Database.

  4. Note: updated premise dimensions from the Ordnance Survey source data may result in changes to heat demand figures when compared to previous versions.

New data fields:

  1. Type: UPRN Type (Parent, Child or Shell).

  2. Parent UPRN: In a building containing multiple properties, this column provides the parent Unique Property Reference Number (UPRN).

  3. Heat Demand Banding: Categorises the annual heat demand (kWh) of the property as 'very low', 'low', 'medium', 'high' or 'very high'.

  4. Represents Total Heat Demand: This field can be used to obtain the total heat demand of a local authority or other large area. Filter to rows where this field = True to avoid double-counting heat demands which are split between parent and child UPRNs within the same building.

Data updates: Rooftop PV Potential (Domestic and Non-Domestic)

Methodology updates:

  1. New source data: The main data input source has been changed from DEFRA LiDAR to Ordnance Survey’s National Geographic Database vector data. This change provides a more comprehensive and accurate assessment of roof geometries in the UK.

  2. We now consider roof sections facing favourable orientations even if the majority of a roof faces an unfavourable direction. Previously, the whole building would be ruled out if the majority of the roof faced an unfavourable direction.

The suitability thresholds have also been relaxed to classify East-West orientations as suitable. Previously, only buildings with South-facing roofs were classified as suitable.

New columns added:

  1. Type: UPRN Type (Parent, Child or Shell).

  2. Parent UPRN: In a building containing multiple properties, this column provides the parent Unique Property Reference Number (UPRN) for the given child UPRN.

  3. Solar Presence: Indicates if PV is already installed on the roof, based on OS NGD’s data which uses satellite imagery to assess PV presence

  4. Remark: This column lists all reasons why a building has been ruled unsuitable where Overall Suitability = False.

Data updates: Air Source Heat Pump Potential (Domestic and Non-Domestic)

Methodology updates:

1. The minimum required garden area for an air source heat pump has been updated in line with the 2025 amendment to the Town and Country Planning (General Permitted Development) Order - Class G, which removed the 1m boundary rule.

The area assessment now considers total garden area (front and back combined), where the old methodology considered only the back garden. You will notice a higher number of suitable properties than previous data iterations.

2. We now consider the most granular record within a building (child UPRN preferred over parent, and parent preferred over shell) to assess suitability.

Previously, all UPRNs within a building were assessed individually regardless of their relationship to other units on the same site.

New columns added:

  1. Type: UPRN Type (Parent, Child or Shell).

  2. Parent UPRN: In a building containing multiple properties, this column provides the parent Unique Property Reference Number (UPRN) for the given child UPRN.

  3. Remark: This column lists all reasons why a building has been ruled unsuitable where Overall Suitability Rating = False.

  4. Total Garden Area (m²): The total area of the garden linked to this property, excluding the building footprint.

Data updates: Ground Source Heat Pump Potential (Domestic and Non-Domestic)

Methodology updates:

  1. We now consider the most granular record within a building (child UPRN preferred over parent, and parent preferred over shell) to assess suitability. Previously, all UPRNs within a building were assessed individually regardless of their relationship to other units on the same site.

  2. For domestic properties, the area assessment continues to use back garden areas only, as horizontal ground loop systems are typically installed at the rear of domestic properties. For non-domestic properties, the area assessment uses total curtilage area rather than back gardens only.

We’ve used peak heat demand for each UPRN to calculate the minimum required area for a GSHP.

New columns added:

  1. Type: UPRN Type (Parent, Child or Shell).

  2. Parent UPRN: In a building containing multiple properties, this column provides the parent Unique Property Reference Number (UPRN) for the given child UPRN.

  3. Remark: This column lists all reasons why a building has been ruled unsuitable where Overall Suitability Rating = False.

  4. Total Garden Area (m²): The total area of the garden linked to this property, excluding the building footprint.

Data updates: Energy Performance Certificates (EPC) - Actual & Inferred - Domestic

Methodology updates:

  1. We now infer the main fuel type for a property when it does not have an EPC record. This is done using the most common fuel type for the property's postcode, with values from nearby postcodes used where the property's own postcode has no EPC data.

  2. We now infer insulation types using Climate Change Committee (CCC) archetypes. Where insulation status (cavity wall, external wall, roof, under floor) were previously marked as ‘unknown’, we now match each property to a CCC archetype by property type, construction age band, and fuel type to infer insulation status.

Any remaining gaps are populated from insulation values from the nearest property with similar characteristics.

New columns added:

  1. Type: UPRN Type (Parent, Child or Shell).

  2. Parent UPRN: In a building containing multiple properties, this column provides the parent Unique Property Reference Number (UPRN) for the given child UPRN.

  3. Main Fuel Actual or Inferred: Indicates whether the Main Fuel value originates from an EPC certificate ("Actual") or has been inferred by postcode ("Inferred").

  4. Cavity Wall Insulation Actual or Inferred: Indicates whether the cavity wall insulation value originates from an EPC certificate ("Actual") or has been inferred using CCC archetypes ("Inferred").

  5. External Wall Insulation Actual or Inferred: Indicates whether the external wall insulation value originates from an EPC certificate ("Actual") or has been inferred using CCC archetypes ("Inferred").

  6. Roof Insulation Actual or Inferred: Indicates whether the roof insulation value originates from an EPC certificate ("Actual") or has been inferred using CCC archetypes ("Inferred").

  7. Under Floor Insulation Actual or Inferred: Indicates whether the under floor insulation value originates from an EPC certificate ("Actual") or has been inferred using CCC archetypes ("Inferred").

Data updates: Low Carbon Technology Costs (Domestic and Non-Domestic)

These datasets have been refreshed to ensure all costings are based off of updated sizing recommendations from the above renewable potential datasets.

Data Stories enhancements

  1. Use the ‘add table of contents’ button to include a navigation page in your data story, allowing viewers to see what content is included in your story, and skip directly to specific sections.

  2. Data story viewers can now customise dataset colouring on published data stories, to support accessibility measures.

  3. Authors can now select from a range of base maps when adding datasets to a section, which will be reflected in the published view of your story. These are identical to the base maps already available in the Data Explorer.

  4. Highly requested, Portfolios can now be added to data stories as an interactive map. Optionally, allow viewers to see your filtering criteria alongside the portfolio results.

Map enhancements

In our last update we released the Statistics tool, which allows users to quickly query datasets to generate key insights such as counts, averages, minimums, and maximums.

Now, you can run the same queries on pre-filtered data. For example, you could run a query to identify the total annual generation potential for all buildings where rooftop PV suitability is ‘true’.

You can also now view stacked datasets: Stacked datasets occur when there are multiple rows of information on the same point or geometry on the map.

For example: in the Addressbase Premium dataset, a single building may contain multiple Unique Property Reference Numbers (UPRNs):

Feature enhancements: Scenarios

Following the release of our Off Street Parking Potential dataset in the last release, you can now include EV Chargers in your Scenarios. Scenarios will use the Off Street Parking Potential dataset to allocate chargepoints to suitable domestic properties.

As always, you can find ‘how-to’ guides and video guides in the Knowledgebase, as well as Live Chat support.

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