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The eco-building fraternity is likely to be suspicious of the government鈥檚 recent volte-face on green construction outlined last month in the clean growth strategy.

This document, released by the Department for Business, Energy and Industrial Strategy (BEIS), purports to put green building back on the agenda with new building energy efficiency targets (see highlights from the Clean Growth Strategy below). Its measures include a new goal that as many private rented homes should be upgraded to meet the band C energy performance certificate requirement by 2030 with the same ambition for all dwellings by 2035. The more than 200 documents published to accompany the strategy also include a call for evidence on incentives to encourage energy efficiency such as green mortgages. 

However, it is only two years since the Conservative government, pumped up after its outright victory at the 2015 general election, scrapped a host of  green building measures, including the once-flagship zero-carbon housing initiative. So, why has the government re-embraced the environmental agenda after dropping it like a stone such a short time ago? Can economic growth and decarbonisation work together and can the industry have faith that anything will come of discussing sustainable building this time around?

Why the about-turn?

A change in personnel helps to explain the change of tone. Recently named climate change and industry minister Claire Perry, who leads on the strategy, is a committed environmentalist. Her departmental secretary of state Greg Clark is happy to parade his credentials based on having helped former prime minister David Cameron to implement more environment-friendly policies in the Conservative Party during the late noughties.  

But perhaps the biggest change has been the departure from government of Nick Timothy, Theresa May鈥檚 former joint Downing Street chief of staff, who once branded the Climate Change Act as a 鈥渕onstrous act of self-harm鈥� by the UK. 

The Conservatives also have pressing electoral reasons to re-embrace the green agenda. A poll recently carried out by the Tory think tank

Bright Blue showed that climate change is ranked as the most important single issue by the 18 to 24-year-olds, a cohort that has deserted the party in droves since 2010. 

鈥淭he Conservatives will never win another majority unless they attract young voters and one of the issues that those voters care about is climate change,鈥� says John Alker, director of policy and places at the UK Green 好色先生TV Council (UKGBC). 

In addition, big business support for action on climate change has solidified since the signing of the Paris Agreement on climate change in 2015, despite president Donald Trump鈥檚 decision to pull the US out of the accord.

Meanwhile, evidence has been stacking up that growth need not be sacrificed in the push to decarbonise the economy. A study, published earlier this year by the Energy and Climate Intelligence Unit think tank, showed that the UK had been more successful than any other G7 nation in decoupling emissions and economic growth over the past 25 years. And if anybody needed extra evidence, the plunging cost of generating offshore wind power in September鈥檚 renewable energy subsidy auctions provided it. 

Nevertheless, the pace of the government鈥檚 about-turn has caught even close observers on the hop. Sophie Walker, UK head of sustainability at JLL, says: 鈥淚 am surprised that the government has moved so much at pace on this, post-Brexit vote.鈥� 

鈥淓nergy efficiency felt like a poor relation 鈥� hopefully this is a sign that the tide is turning鈥�

John Alker, UK Green 好色先生TV Council

Alker says that it is a long time since the government has been so encouraging about decarbonising the economy. 鈥淔or companies, there is a sense that this government means it, which is really helpful. It鈥檚 not a question of whether but how,鈥� he says. 鈥淭here is a lot of work still to do but it was a lot better than it could have been.鈥� 

The document鈥檚 focus on energy efficiency can be explained by broader trends in power generation. The UK looks set to exceed its climate change targets until deep into the next decade, largely thanks to the switch from coal-powered electricity generation to less heavily emitting sources of power, such as gas and renewables. 

鈥淲e鈥檝e been coasting along on energy supply system changes that have delivered on our early carbon budgets. Enough people have demonstrated to government that it鈥檚 not going to get us all the way,鈥� says Joanne Wade, chief executive of the Association for the Conservation of Energy. 

However, now that the proportion of electricity generated by coal has dwindled to negligible proportions, generating electricity will deliver diminishing emission reductions. 

A heated issue

Heating from buildings, which is responsible for around one-third of all UK greenhouse gas emissions, is the next big decarbonisation challenge. The problem here, though, is that there is no clear path to phase out gas heating, which would need to happen in order for the UK to meet its carbon reduction targets. 

Getting everybody to swap their gas boilers for electric central heating is technically feasible but would require a vast increase in generation capacity in order to satisfy peak time winter demand. 

Wade says: 鈥淒ecarbonising heat is not as straightforward as decarbonising electricity 鈥� there aren鈥檛 obvious options, so it鈥檚 concentrated the mind.鈥� As a result, the focus has moved back to energy efficiency as the best hope for achieving the next big wave of carbon savings. 

The spin-off benefit is that less leaky properties reduce the overall size of the decarbonised heating challenge. The added twist is the furore over energy bills, with the government seemingly accepting the argument of its statutory advisers at the Committee on Climate Change that energy efficiency is the best long-term solution for lowering household fuel costs. 

It鈥檚 too early to detect in the strategy the outlines of a building retrofit scheme to replace the Green Deal, which proved such a flop until it was wound up two years ago.

Nevertheless, Alker says that it is a long time since the government has made so many encouraging noises about decarbonising the built environment. 鈥淓nergy efficiency felt like a poor relation 鈥� hopefully this is a sign that the tide is turning,鈥� says Alker. 

Bevan Jones, managing director of Sustainable Homes, says it is good that decarbonisation of the built environment is 鈥渂ack on track鈥� with the establishment of a trajectory for ensuring that decarbonising social and private rented housing by 2030 and performance certificates get back on track. 

However, while the clean growth strategy points the UK to a greener destination, it is less clear about how the UK will get there. 

Direction needed

鈥淭he obvious criticism is that it needs more detail. There is a lot of talk but not much specific on energy efficiency,鈥� says Barny Evans, head of sustainable, places, energy and waste at engineer WSP. 

Andrew Dixon, head of policy at the Federation of Master Builders, agrees: 鈥淭he objectives are reasonably ambitious but there鈥檚 not a lot of flesh on the bones.鈥� He identifies the treatment of owner-occupied housing as the biggest grey area in regard to energy efficiency. While private rented sector housing is expected to meet the EPC benchmark band C by 2030 where possible, owner occupied homes are not due to meet a similar standard until five years later. Meanwhile, big question marks remain over how home owners will be incentivised to upgrade their properties following the collapse of the Green Deal.

JLL鈥檚 Walker points out that it would be useful for the industry to be informed about direction of travel. 鈥淚f we know where we are heading, we can invest early.鈥�

The strategy is particularly woolly on new-build stock. The UKGBC鈥檚 Alker argues that zero-carbon housing needs to be back on the agenda as part of the review of building regulations commissioned following the Grenfell Tower disaster, the interim report on which is expected later this month. The UKGBC is pushing for all new housing to be net zero carbon emitting by 2030, extending across to the entire building stock by 2050. He argues that it is 鈥渕adness鈥� to be building stock that will have to be refurbished in 20 years because its energy performance isn鈥檛 up to scratch. 

鈥淎t the moment, we are building properties that will have to be retrofitted, which is really not sensible,鈥� agrees David Adams, technical director at Melius Homes, which is developing ultra-low emitting Energiesprong housing pioneered in the Netherlands. 

Another concern is that the strategy is very long on consultation. As well as getting feedback on the document itself, it promises a plethora of consultation exercises on issues such as how to get social housing properties up to EPC band C by 2030 and minimum energy efficiency standards for rented commercial buildings. The document also heralds a number of calls for evidence, the most important of which relates to how to provide better incentives to encourage improved energy efficiency.

The last thing that the green building sector seems to want is more consultation, Adams says: 鈥淗ow many times do you need to ask people what you are doing? We need to get on and do something.鈥� Jones agrees that the time for talking is over: 鈥淚鈥檓 not sure that we need more consultation on low-carbon building standards because we know what needs to be done.鈥� 

Convincing doubters

And the government will have its work cut out convincing those who have been marched up the zero-carbon homes hill and then back down again that this time it is serious. Wade at the Association for the Conservation of Energy says: 鈥淭he industry is still keen to work with the government but they are nervous because they have had their fingers burned. We would like to see something very definite.鈥� 

Alker agrees that there must be a 鈥渜uite substantially different set of policies on the table鈥�, including minimum standards for private rented housing, a firm trajectory for decarbonising owner-occupied housing and fresh financial incentives for retrofit work to replace the scrapped (albeit unlamented) Green Deal. 

But this will require the green message to be heard across Whitehall. 鈥淭he concern is that there鈥檚 not much joined-up policy between the Department for Communities and Local Government and BEIS,鈥� says Sustainable Homes鈥� Jones.  

Alker doubts that when the volume housebuilders piled into Number 10 Downing Street last month to discuss housing delivery,  green building was on the agenda.  

鈥淗ousing policy can鈥檛 be treated separately to the clean growth strategy. There is a slight danger that [the government] considers this a green box to be ticked, but this needs to weave through all aspects of housing and industrial strategy.鈥� 

鈥淚t鈥檚 a good start, but there is still some way to go for this to be genuinely embedded across all government departments,鈥� he says, adding that the acid test for the government is whether it is willing to use stamp duty to encourage homeowners to upgrade their homes. 

Adams, who is a former director of the defunct Zero Carbon Hub, worries that government remains wedded to fears that higher green building standards will hurt housing supply, increasingly its overriding priority.  

鈥淭hey think it鈥檚 a zero-sum game and that more regulation equals less homes. There is no evidence for that 鈥� they can do both.鈥� 

Wade suggests that ministers could demonstrate their bona fide green credentials by allocating a pot of money in the Budget later this month to pump prime a regional pilot of stamp duty rebates for householders who have upgraded their homes.  

Wade says: 鈥淭he top-level messages were good 鈥� now we have to make it happen. The next six months is going to be crucial as to whether it is remembered as a good document or hot air.鈥� 

The government will need more than warm words to demonstrate to construction that it is serious about tackling the heating planet.