asked Her Majesty's Government:
What estimate they have made of the amount by which the rateable value of properties will rise following the installation of microgeneration technologies; and what impact this will have on the total amount of council tax collected.
The Government have made no estimate of the amount by which the value of domestic properties might rise following the installation of microgeneration equipment. There will, however, be no council tax consequences.
Any change or improvement to a property which increases its value cannot result in a higher council tax band until the property is sold or any future revaluation of properties takes place. Even then, the banding system means that only an improvement that significantly increases the value of the property would be likely to push it into a higher band.