Worked retrofit examples

This page contains representative retrofit scenarios that show how different UK homes might approach energy upgrades. These are editorial worked examples, not paid testimonials, and they are intended to help readers compare options in context.

How to use these examples

  • Focus on the order of work, trade-offs, and lessons learned.
  • Do not assume the quoted figures will match your home exactly.
  • Use the examples alongside our calculators and technology guides, not as a substitute for a survey.

Example: Victorian terrace heat-pump retrofit

  • Property: 2-bed Victorian mid-terrace with solid brick walls.
  • Starting point: higher heat loss, limited external space, and an older gas boiler.
  • Upgrade path: loft-insulation top-up, radiator review, weather-compensated controls, and an air source heat pump.
  • Main lesson: older homes can work well with heat pumps when the system is designed around realistic heat demand and emitter upgrades.

Example: 1930s semi with solar and battery

  • Property: 3-bed semi with a usable south-west roof.
  • Starting point: moderate electricity use, decent roof space, and interest in reducing peak-time imports.
  • Upgrade path: solar PV first, then a modest battery and tariff review.
  • Main lesson: battery value often depends as much on tariff strategy and usage pattern as on panel count.

Example: draughty family home focusing on fabric first

  • Property: family house with comfort complaints, inconsistent room temperatures, and no immediate boiler replacement planned.
  • Starting point: heat escapes quickly and running costs feel high.
  • Upgrade path: loft top-up, draught-proofing, glazing checks, and a later review of heating-system replacement.
  • Main lesson: reducing heat loss first can improve comfort immediately and make future heating upgrades cheaper and easier.

What these scenarios are based on

The worked examples are built from common UK property types, published cost ranges, typical retrofit constraints, and the same general assumptions used across our guides. Where a named or reader-submitted case study is published in future, we will identify it clearly.

Next steps

Written by NetZeroNow Editorial Team | Last updated on 2026-03-30