[rscale]

The dedicated work-only office was my most important productivity enhancement. It helped me prevent burnout (where I'd just work every single hour), and it also helped my spouse understand when I was "at work" and should be treated thusly.

As an added bonus in the US, a dedicated work-only workspace can be eligible for a Home Office tax deduction.

[lesleyb]

In the UK, you can offset the costs of the office space against tax - proportioned heating and lighting etc. But if/when you sell the property you need to be aware of possible Capital Gains Tax liability on the office space.