I would replace it with 2 42" freestanding vanities, which are meant to be installed with space around them. 42" is a pretty common size and you should have lots of selection.

Home Depot examples

That would give you ~ a 3.5" space between each vanity and the wall, and between the vanities. Many already have the top and sink as part of the vanity so it's "all inclusive".

It’s a complete waste of money that will cost you more than replacing on a small job like that.

Valid point.

By removing the existing, I’m looking at retiling the floor and behind the vanit(ies).

There is a separate part of the bath behind a door (toilet, shower and tub and brown tile) being removed.

You can see the door jam in photo.

That facelift prompts redoing the vanity area.

one thing leads to another....

it all started with loose shower tile and replacing with an insert, then the tub, toilet, walls......

At work we call it "scope creep".

Lots of people just get the closest size (or two to make up the difference) that fit and build out a false frame of a few inches either side to make up the difference.

What if you took the suggestion of 2 42” vanities then had filler put in to make it look like one? Have the stone top made to go straight across. I agree with the others there’s not much worth saving and you probably won’t be happy with the $$ spent refacing. Good luck!

We refaced in 3 bathrooms, but the boxes were strong and in perfect shape. Whether or not it's worthwhile would depend on if your boxes are in great shape and strong enough to support a stone counter.

If you decide to replace the whole vanity, you don't necessarily have to fill the entire space wall-to-wall. You can get 2 separate vanities like suggested above, or you could get 1 double vanity. Just be sure to leave enough room for cleaning in between the walls and vanities, and between the vanities if you get 2. You don't want to leave a little sliver of space because it will just collect junk and you won't be able to get a cleaning tool in there. I can't remember the "rule of thumb" on that, but I would think it's at least 3 or 4 inches. Maybe a pro can tell you what the bext amount of space is.

i always have mine custom made by a very good cabinetmaker. Perhaps I’ve been lucky but his prices are pretty much the same as decent ready made ones. They’re made to my specifications, well worth the $ IMO.

On another topic, turn your lighting sconces to cast light DOWN rather than illuminating the ceiling.
I agree with K Laurence on a custom cabinet for all the reasons noted. They build, paint, install. Be sure you include a section or two of four drawers.

Update.

Refacing comes in about $2,200

(solid maple doors, new drawers).

Vs new cabinet base(s) $4,200 (Waypoint).

Approx - granite top $1,600 man made stone $2,000.

My carpenter doesn’t paint

Thanks all.

Or, much more reasonably priced, 2 of these 40" vanities from Home Depot. Cost for both vanities $1388, which include granite tops and sinks. Home Depot (and other retailers I am sure) have plenty of other styles and colors, although I like the 7 drawers on this one. The extra 15" space (95" - 80") leaves plenty on either side and in between for cleaning.

Plus matching mirrors for $80 each. Probably cheaper than reframing your existing one.

PC,

Have you actually found a local custom cabinet builder to give you a proposal?

You might be surprised. When we remodeled our master bathroom, I went into it assuming custom always meant more $$$. For me, custom was actually less, better-built, and I got exactly what I wanted. Our vanity is not fancy, just a 96" 2-sink vanity with shaker-style doors and a drawer stack in the middle.

Of course, you do have to add the painting costs into the equation so that you are comparing apples to apples. So maybe get a quote from a quality local painter on what they would charge to paint off-site (some like to do it on-site). The same painter will probably be coming to paint the rest of your bathroom, so have them give you an all-inclusive proposal for the vanity, trim, walls, etc.

Once you remove everything around the vanity and put in new everything else, saving the box may not be worth it. The two vanity idea above, with a 15” space gives you the option to have space around both of them and give a lighter less-crowded feeling.
Do you have an overall plan? Inspiration photos to share?

If you don't want to do anything extensive (and I understand that....), maybe you can paint your existing vanity and just replace the top. There a numerous examples of vanities that have been painted and look great. If your vanity is in good shape, but just dated, paint can go a very long way. And if you call around to the stone yards, you may be able to land a better deal on the granite. Good luck with your updates.

If you found a couple items that you liked/loved, current item or two might recede from view.

3-Light Stainless Steel Simple Designed Bath Vanity Light · More Info

https://www.houzz.com/products/3-light-stainless-steel-simple-designed-bath-vanity-light-prvw-vr~42372349

W 18.5" / D 7" / H 4.75"

2-Light Bath and Vanity Antique Bronze Finish With Clear Shades · More Info

https://www.houzz.com/products/progress-lighting-archives-19-bath-bar-with-cylinder-shades-antique-nickel-prvw-vr~54375353

i'm crazy about warm neutrals, so do you like any dark bronze?

Progress Lighting P2809-20 Archives Bathroom Light, Antique Bronze · More Info

https://www.houzz.com/products/progress-lighting-archives-19-bath-bar-with-cylinder-shades-antique-bronze-prvw-vr~105340308

Their display photo is good - maybe you could frame mirror [and remove the solid brown border]... add 2 sleek lights - see the sink style -

Procyon LED Bathroom Light, Silver, 23" · More Info

https://www.houzz.com/products/procyon-led-bathroom-light-silver-23-prvw-vr~48726221

16 or 30"W

Edge 16" Bath Bar With White Shade, Satin Nickel, 16" · More Info

https://www.houzz.com/products/edge-16-bath-bar-with-white-shade-satin-nickel-16-prvw-vr~46921641

Saw in hotels and liked. This seems fancy: use the sensor with a wave of your hand. Can be mounted in portrait or landscape position. W 24" x D 2" x H 36" •White LED 6000 K •CRI: 80 / •Wiring for this unit is located in the center of the white steel base.

Modern Bathroom Mirrors · More Info

https://www.houzz.com/products/led-striped-illuminated-mirror-prvw-vr~44887997

I've seen some refaced cabinets with doors and drawers that were state-of-the-art spectacular. This ain't your momma's refacing these days, despite the lingering contempt from the landfill design community.

A chance your 'grounding brown' bascksplash could be a good horizontal base for 2 expensive mirrors like the LED kind [hung horizontally to keep the line of a backsplash].

Photo I posted above showed a similar brown with mirror look [unusual lights]…. so maybe an 'add' could do it for you, instead of tearing out....

In other words, does your cabinet bear resemblance to typical ok Ikea's... and so, it'd be current enough.....?

It’s funny several people have commented on how much they like the The existing brown tile ????

The tile is groovy. I wonder how old it is?

1964. If it weren’t falling apart around the shower I’d leave it be. ✌ Though preference to classic black and white.

Found myself looking at unfinished base cabinets intending to paint them.

What's old is new again. Avocado green, here we come!

I recently saw a "new" tile that looked sooo much like my parent's 1966 bath tile. Brown and green, very woodsy colors in a small rectangular shape. I could compare the two tiles because I have an old picture of my 2 year old son in their tub. (He's now 35.) Virtually identical.

look at pre-fab countertops. you can get a 8' or 9' X22" deep piece, finished edge for about $450. the installer will cut out your sink holes and fit it to your width for maybe another $700 or so.

these are just a small sample of the prefab countertops at my tile place. many stone yards carry them.

plain white quartz

Beth's white counter idea // and this room's base seems like yours? so maybe you'd like quartz or other in an off-white? This room features vanity in durable wood-like melamine finish (Stevenswood)

I just got a quote for my 114” space with painted kraftmaid from Lowes for $3k.