no.. the dead bits are dead.. those parts will not re-green ...

as to whether it will fill back in.. only time will tell ... but i would not wait for it ...

they are way past the prime of their lives... if it were my decision.. i would be thinking it is time to re-assess their value in my garden ..

i would cut them flush with the ground... widen the bed to 6 feet ... and plant some new stuff about 3 feet out from the house .. if not 4 .. see below ... then bury the whole bed in PROPER mulch ...

ken

ps: besides the fact that they are planted too close to the house.. necessitating the shearing ... i mean really.. a plant that is 6 to 8 feet wide.. planted ONE FOOT from the foundation .... and as to replacements.... you better learn all about the annual growth rates of conifers... you have a 2 foot wide bed .... frankly.. nothing but the ultimate MINI should be planted there .... do NOT buy the cosco $35 bargains.. unless. you plan on widening the bed to 6 feet.. and planting these at least 3 feet from the foundation ....

Here is a link that might be useful: how to plant .. water and mulch