I pray it's not voles that I have. I think i was mice because I found a little nest and the roots were exposed enough (I dug it up kinda sloppily) so that after eatting the rosette of foliage the mouse could suck up the roots like little tasty strands of spagetti. The garage can warm up on a decent winter day.... the furnace and water heater are in a side room that vents to the garage so that adds to the warmth. It probably stays in the 40's. Ok the fig tree I keep in there is starting to sprout now too. I wonder if I can put it somewhere colder.... I already put all the potted bulbs outside, I gave up on winter. Terrene: open up one of their tunnels, put peanut butter on a trap and cover it with a board or something... if you can catch a few dozen it might make a difference. (from someone who was shocked one spring to find a mature cherry tree dying because it's roots were completely girdled and stripped)

Remove the nest and clean out the box. I do this the very day the babies fledge. Hose it out, then scrub with water and a little bleach, and rinse again. This will take care of any possible parasites, etc. Leave the door open for a day to let it dry completely. Hopefully, Mama will start a new nest pretty soon. Last year, my Mama blue began her 2nd nest 13 days after the first brood fledged. This year, she waited a little longer. The babies fledged on 5/2 and today she laid her 5th egg! Congrats and I hope you have more little blues soon! Donna

Thank you all for all the comments here. I have a nest though while no eggs (3 robins fledged successfully ages ago) the nest remains the parents home. Issue is it's under my bedroom window in ivy which due to leaving them so long, its now completely covered the window and onto the roof. I'm going to build a box as shown by rober49 (thank you) and place it under the eaves for protection. The nest is huge and looks very solid (i.e., been in use a very long time). The robins eat from my hand (as did their babies) so trusting they will understand, forgive and continue using their relocated nest. The UK robins are tiny compared to those in the US. Ours are a fair bit smaller than a tennis ball. I think your's are on steroids. Thank you all ... feeling much happier about this.

Maximizing resale value here is putting away the plans and moving. You are planning a very expensive remodel here that you will NEVER recoup the costs from. Which is OK if you plan to live there long term or are willing to pay for the increased livability as an expense and not an "investment". But, be very very sure you completely internalize that statement before moving forward with your plans.