Posted By: fostertom"The Energy Saving Trust estimates that ... electric vehicle charging points [cost] about £1,000" - for £5000 resale boost!

Yes, quite. Totally unbelievable.

House valuation is an art not a science and it must be nearly impossible to assess what is and isn’t influencing the value.

Two identical house one with end of life wood windows and with replacement windows costing/worth thousands valued the same as in same area with same number of bedrooms.

The valuation system is a mystery to me

The methodology is a little suspect if I understood it right. They looked at sale prices and found that houses with car chargers sold for a couple of % more. (2% of average house price => £5k). They didn't ask whether recently-refurbished houses sell for more money, or whether houses with off-street parking sell for more money, or whether car chargers are more likely to be found in those houses.

They admit that they have guessed that the apparent price rises due to these different ecobling items might be additive, but that there is no evidence for this.

Santander have put up a report saying that energy ratings matter and people will pay 9.4% (or ~27 grand) extra for a retrofitted property, and estate agents say they are actually paying 15-20% extra.
https://www.santander.co.uk/about-santander/media-centre/press-releases/a-green-premium-house-buyers-willing-to-pay-almost-10

The actual report is here: https://www.santander.co.uk/assets/s3fs-public/documents/buying_into_the_green_homes_revolution_report.pdf

They also seem to think that a retrofit costs 10 grand on average, which is a pretty shallow retrofit in my book.
But still it's good to see that (at last) the populace is getting a clue and has worked out that 'fabric before kitchens' makes sense.

Looking in the report the retrofit cost comes from: "The Climate Change Committee (CCC) estimates that the UK will require an investment of about £250 billion to fully decarbonise homes by 2050. This equates to approximately £10,000 per household"

That seems exceedingly approximate. That decarbonisation cost could just be fitting a heat pump to all gas boiler houses. That decarbonises, but doesn't improve the fabric at all. I reckon AECB retrofit grade work is at least 20 grand on average, and probably rather more depending on how costs come down with scale. I've spent 35 grand, mostly DIY (for more like 30kWh/m2 than 50). I know someone else who spent 115 grand paying builders, and that didn't even include a heat pump (supply too feeble). One would have to read the CCC report to check what they meant.

Interestingly 40-55% of people (varying by region) could afford 10 grand, except in London where only 25% could. So Londoners are skintest. Sadly they didn't ask how many could afford 20 grand, or 3 grand/yr for 10 years.

The word 'airtightness' appears nowhere in the whole report (sigh!). They do at least include 3G and MVHR but their idea of retrofit is still at the 'loft insulation and cavity wall' (i.e shallow retrofit) level.

Still it is quite encouraging in terms of how many people think it's important, how many are prepared to spend money/effort/time on it, how many actually have some money, and the degree to which improvements generate asset value (which makes the sums on most retrofit much more attractive). I see that Santander have schemes for better rates on lending extra mortgage money for retrofit, which is IMHO by far the best way of managing the finance for this stuff.

Very interesting to see changes - 10k per home is insufficient and undeliverable.