There are many points of view about this. If money is no object and you have the space, by all means buy a recording booth.A good one will cost between $4000 to $7000. Today however there are some amazing noise reduction filters. Sound Soap has been purchased from the now out of business Bias-Peak ($149) Izotrope has some truly amazing filters that cost more ($ 350 to about $800)
and of course Waves filters has all kinds of noise reduction filters, but my favorite is Waves NS 1 Noise Suppression Filter.
When you are recording, you will leave about 3 seconds of room noise space before you speak. These filters can then memorize the room noise and strip only that from your recordings leaving amazingly clean voiceover recordings without doing bad things to the sound of your voice.
Check ou these links to see if they interest you.
We make no money or commissions for any recommendations we make:)
Automatic Noise Suppression Plugin – NS1 | Waves
iZotope RX 3 | OVERVIEW
SoundSoap 3 Noise Reduction