Consumer Unit Replacement: Cost, Testing and Scope
Consumer-unit replacement cost depends on board design, circuit number, existing condition, testing results, access, labelling, remedial work and the documentation included.
Use the guide to prepare better questions and understand the decisions that may need property-specific evidence.

These guides help you prepare for a conversation; advice is always tailored to the installation itself.
What a consumer-unit quotation should cover

A useful quotation or inspection record explains the evidence behind its conclusion, the areas it covers and the condition that could alter it. The customer can then compare scope rather than confidence of wording. Toogood Electrical uses this guide to prepare the enquiry. The final advice still depends on the real property, current primary guidance, manufacturer information where relevant and the inspection or design evidence gathered. Count circuits and identify supplies beyond the main dwelling. This point can change the best approach because the work needs to follow the condition and layout of the property. Pre-work information may expose issues needing investigation. Put that item in the written brief with the responsible person and the stage at which it must be confirmed.
Consumer-unit replacement cost depends on board design, circuit number, existing condition, testing results, access, labelling, remedial work and the documentation included. The short answer is deliberately conditional so a reader can prepare without mistaking general guidance for a diagnosis of an unseen installation. Discussion of board position, access and isolation is the relevant assessment lens here. Record what can be seen, what can be tested and which inaccessible condition remains an explicit limitation. Protective-device selection depends on the installation and circuit arrangement provides the technical check. It can influence equipment, circuit design, protection, access or whether a recommendation remains appropriate after inspection. Installation and termination of the new board is the delivery point to connect with this decision. Information received after that point may create rework, a programme change or a revised quotation.
Record of any limitations or separately quoted remedial work is one potential handover record. Confirm the document that applies to the work actually completed instead of relying on a generic promise of certification. Duration of electrical isolation should be listed beside the project outcome. It may not change the answer, but leaving it unexamined makes two apparently similar properties difficult to compare. Applicable certification and notification should be identified. This neighbouring issue helps test whether the current section is complete or whether the reader is solving one part of a connected electrical decision. For “Consumer Unit Replacement: Cost, Testing and Scope”, keep confirmed facts, customer preferences, provisional allowances and electrician recommendations in separate lines. That structure makes later changes traceable.
- Count circuits and identify supplies beyond the main dwelling.
- Pre-work information may expose issues needing investigation.
Evidence for what a consumer-unit quotation should cover
Count circuits and identify supplies beyond the main dwelling. Pre-work information may expose issues needing investigation. Record the property-specific evidence, decision owner and any limitation before relying on the conclusion.
Testing before and during replacement
Toogood Electrical uses this guide to prepare the enquiry. The final advice still depends on the real property, current primary guidance, manufacturer information where relevant and the inspection or design evidence gathered. Existing faults should not be hidden by new equipment. This point can change the best approach because the work needs to follow the condition and layout of the property. Protective-device selection follows circuit characteristics. Put that item in the written brief with the responsible person and the stage at which it must be confirmed. Consumer-unit replacement cost depends on board design, circuit number, existing condition, testing results, access, labelling, remedial work and the documentation included. The short answer is deliberately conditional so a reader can prepare without mistaking general guidance for a diagnosis of an unseen installation.
Testing that may reveal circuit issues affecting the scope is the relevant assessment lens here. Record what can be seen, what can be tested and which inaccessible condition remains an explicit limitation. Earthing and bonding condition can affect the work required provides the technical check. It can influence equipment, circuit design, protection, access or whether a recommendation remains appropriate after inspection. Certification, notification where applicable and handover is the delivery point to connect with this decision. Information received after that point may create rework, a programme change or a revised quotation. Part P notification where applicable is one potential handover record. Confirm the document that applies to the work actually completed instead of relying on a generic promise of certification.
Access around the board should be listed beside the project outcome. It may not change the answer, but leaving it unexamined makes two apparently similar properties difficult to compare. Pre-work information may expose issues needing investigation. This neighbouring issue helps test whether the current section is complete or whether the reader is solving one part of a connected electrical decision. For “Consumer Unit Replacement: Cost, Testing and Scope”, keep confirmed facts, customer preferences, provisional allowances and electrician recommendations in separate lines. That structure makes later changes traceable. A useful quotation or inspection record explains the evidence behind its conclusion, the areas it covers and the condition that could alter it. The customer can then compare scope rather than confidence of wording.
- Existing faults should not be hidden by new equipment.
- Protective-device selection follows circuit characteristics.
Evidence for testing before and during replacement
Existing faults should not be hidden by new equipment. Protective-device selection follows circuit characteristics. Record the property-specific evidence, decision owner and any limitation before relying on the conclusion.
Existing circuit issues and allowances

Protective-device selection follows circuit characteristics. This neighbouring issue helps test whether the current section is complete or whether the reader is solving one part of a connected electrical decision. For “Consumer Unit Replacement: Cost, Testing and Scope”, keep confirmed facts, customer preferences, provisional allowances and electrician recommendations in separate lines. That structure makes later changes traceable. A useful quotation or inspection record explains the evidence behind its conclusion, the areas it covers and the condition that could alter it. The customer can then compare scope rather than confidence of wording. Toogood Electrical uses this guide to prepare the enquiry. The final advice still depends on the real property, current primary guidance, manufacturer information where relevant and the inspection or design evidence gathered.
Surge and additional protection decisions need explanation. This point can change the best approach because the work needs to follow the condition and layout of the property. Physical space and cable entry can affect labour. Put that item in the written brief with the responsible person and the stage at which it must be confirmed. Consumer-unit replacement cost depends on board design, circuit number, existing condition, testing results, access, labelling, remedial work and the documentation included. The short answer is deliberately conditional so a reader can prepare without mistaking general guidance for a diagnosis of an unseen installation. Inspection of the existing board, supply, earthing and bonding is the relevant assessment lens here. Record what can be seen, what can be tested and which inaccessible condition remains an explicit limitation.
Surge protection and circuit separation are considered in context provides the technical check. It can influence equipment, circuit design, protection, access or whether a recommendation remains appropriate after inspection. Installation and termination of the new board is the delivery point to connect with this decision. Information received after that point may create rework, a programme change or a revised quotation. Updated circuit schedule and labels is one potential handover record. Confirm the document that applies to the work actually completed instead of relying on a generic promise of certification. Existing circuit condition should be listed beside the project outcome. It may not change the answer, but leaving it unexamined makes two apparently similar properties difficult to compare.
- Surge and additional protection decisions need explanation.
- Physical space and cable entry can affect labour.
Evidence for existing circuit issues and allowances
Surge and additional protection decisions need explanation. Physical space and cable entry can affect labour. Record the property-specific evidence, decision owner and any limitation before relying on the conclusion.
Board design, labelling and future capacity
For “Consumer Unit Replacement: Cost, Testing and Scope”, keep confirmed facts, customer preferences, provisional allowances and electrician recommendations in separate lines. That structure makes later changes traceable. A useful quotation or inspection record explains the evidence behind its conclusion, the areas it covers and the condition that could alter it. The customer can then compare scope rather than confidence of wording. Toogood Electrical uses this guide to prepare the enquiry. The final advice still depends on the real property, current primary guidance, manufacturer information where relevant and the inspection or design evidence gathered. Circuit labels should be verified rather than copied blindly. This point can change the best approach because the work needs to follow the condition and layout of the property.
Unrelated rewiring should remain a separate scope. Put that item in the written brief with the responsible person and the stage at which it must be confirmed. Consumer-unit replacement cost depends on board design, circuit number, existing condition, testing results, access, labelling, remedial work and the documentation included. The short answer is deliberately conditional so a reader can prepare without mistaking general guidance for a diagnosis of an unseen installation. Selection of a suitable configuration and protective devices is the relevant assessment lens here. Record what can be seen, what can be tested and which inaccessible condition remains an explicit limitation. Replacement does not correct hidden circuit faults automatically provides the technical check. It can influence equipment, circuit design, protection, access or whether a recommendation remains appropriate after inspection.
Certification, notification where applicable and handover is the delivery point to connect with this decision. Information received after that point may create rework, a programme change or a revised quotation. Electrical installation certification is one potential handover record. Confirm the document that applies to the work actually completed instead of relying on a generic promise of certification. Future loads and spare capacity should be listed beside the project outcome. It may not change the answer, but leaving it unexamined makes two apparently similar properties difficult to compare. Physical space and cable entry can affect labour. This neighbouring issue helps test whether the current section is complete or whether the reader is solving one part of a connected electrical decision.
- Circuit labels should be verified rather than copied blindly.
- Unrelated rewiring should remain a separate scope.
Evidence for board design, labelling and future capacity
Circuit labels should be verified rather than copied blindly. Unrelated rewiring should remain a separate scope. Record the property-specific evidence, decision owner and any limitation before relying on the conclusion.
Certification and handover
A useful quotation or inspection record explains the evidence behind its conclusion, the areas it covers and the condition that could alter it. The customer can then compare scope rather than confidence of wording. Toogood Electrical uses this guide to prepare the enquiry. The final advice still depends on the real property, current primary guidance, manufacturer information where relevant and the inspection or design evidence gathered. Testing results must match the final circuit schedule. This point can change the best approach because the work needs to follow the condition and layout of the property. Applicable certification and notification should be identified. Put that item in the written brief with the responsible person and the stage at which it must be confirmed.
Consumer-unit replacement cost depends on board design, circuit number, existing condition, testing results, access, labelling, remedial work and the documentation included. The short answer is deliberately conditional so a reader can prepare without mistaking general guidance for a diagnosis of an unseen installation. Discussion of board position, access and isolation is the relevant assessment lens here. Record what can be seen, what can be tested and which inaccessible condition remains an explicit limitation. Protective-device selection depends on the installation and circuit arrangement provides the technical check. It can influence equipment, circuit design, protection, access or whether a recommendation remains appropriate after inspection. Safe isolation and removal of the existing equipment is the delivery point to connect with this decision. Information received after that point may create rework, a programme change or a revised quotation.
Record of any limitations or separately quoted remedial work is one potential handover record. Confirm the document that applies to the work actually completed instead of relying on a generic promise of certification. Duration of electrical isolation should be listed beside the project outcome. It may not change the answer, but leaving it unexamined makes two apparently similar properties difficult to compare. Unrelated rewiring should remain a separate scope. This neighbouring issue helps test whether the current section is complete or whether the reader is solving one part of a connected electrical decision. For “Consumer Unit Replacement: Cost, Testing and Scope”, keep confirmed facts, customer preferences, provisional allowances and electrician recommendations in separate lines. That structure makes later changes traceable.
- Testing results must match the final circuit schedule.
- Applicable certification and notification should be identified.
Helpful information sources
- Approved Document P: electrical safety in dwellings
- Electrical Safety First guidance
- NICEIC consumer and contractor guidance
Last checked 2026-07-31.
Clear answers
Questions about consumer unit replacement
Can this guide confirm the right scope for my property?
No. It explains the decision process, but the right scope may depend on inspection, testing, drawings, equipment information and the condition found on site.
Which documents should I keep?
Keep the applicable reports, certificates, notifications, schedules, manufacturer information and change records for the work completed.
Can photographs replace a site visit?
They can improve the first conversation, but they cannot reveal every condition or replace electrical testing when testing is required.
How current is this guidance?
The page shows when it was last checked and links to the sources used. Regulations and official guidance can change, so check the linked source for the latest information.
Need advice for a specific property?
Share the property, the outcome you need and any useful documents. We will explain whether inspection, design work or a quotation visit is the right next step.
