Connection costs FAQs

To receive an indicative budget estimate: 

• Step 1: Enter your site details and draw the boundary on the map. 
• Step 2: Select your connection point (shown in orange or green) and draw the cable route to your meter location.
• Step 3: Confirm your supply requirements (e.g. single-phase or three-phase, kVA size). once completed, the tool will calculate an idicative cost.

If the tool cannot provide an estimate, this usually means your request is complex or outside the tool's limits. in that case you'll be prompted to contact our team for a manual review. 

The map uses colours to show existing network features:

• Green lines = Existing electricity supplies
• Orange points = Potential connection points

your cable route should start from an orange or green point and end at your meter location. 

Tip: Use the zoom feature for better accuracy when drawing your route.

This message appears when the cable route crosses land that cannot be used for underground cables (e.g. watercourses, protected areas, or unsuitable surfaces).

What to do:

• Adjust your route to avoid restricted areas.
• If you're unsure, check our Ground Type Guidance for examples of valid and invalid surfaces. If you still have issues, contact our support team for help. 

Yes. The tool currently supports connections up to 210kVA and allows you to choose between single-phase and three-phase supply. 

If you need a larger capacity or have specialist requirements (e.g. for commercial or industrial sites), please submit your details via the 'Contact Us' link, and we'll provide a tailored estimate.

If no estimate is shown at the end of the process, it's usually because:

• Your site layout or route is complex.
• Your requirements exceed the tool's limits.
• Additional checks are needed for safety or feasibility.

Next steps:

Use the contact details provided on the results page to reach our team. We'll review your request and provide a manual estimate as quickly as possible.

The estimate you receive is indicative only. It's based on standard assumptions about cable routes, excavation, and connection points. 

Why it might differ from the final cost:

• Site-specific conditions (e.g. ground type, obstacles, or private land access).
• Additional requirements such as ev charging or multi-meter setups.
• Regulatory or safety checks that require design changes. 

For a confirmed price, a detailed site survey and formal quotation will be needed. The tool is designed to give you a quick starting point for planning and budgeting. 

Currently, the tool supports one meter position per request and standard domestic or small commercial connections:

If you need:

• EV charging points
• Multiple meters for different properties
• Specialist supply types (e.g. three-phase for large loads)

Please complete the online form and select 'Additional requirements'. Our team will review your details and provide a tailored estimate. 

If the tool freezes or crashes:

• Refresh the page and try again.
• Use a different browser (Chrome or Edge works best).
• Ensure your device meets minimum requirements (modern browser, stable internet connection).

If the issue persists, click the 'Report a problem' link on the tool page or email our support team at nged.websiteenquiries@nationalgrid.co.uk. We'll help resolve the issue quickly.