Can you cite lack of privacy/now being overlooked as a planning objection?

[Cherryicecubes]

I live on a hill, in a detached house. The rest of the hill are all semi detached like next door, and identical house layouts. Next door’s land is approx 6 feet above ours. Currently there are two garages separating our properties, (one each).
Had a letter about them seeking planning permission this morning, and they propose to demolish the garage, and build a single storey extension.
As you can see from the plans, this will not only bring their property to almost the the boundary, but there will now be huge patio doors next to our boundary, so anybody will be able to look into our garden from their dining room. We deliberately bought a detached house as we wanted to be a fair way from neighbours.
Has anybody on here objected on grounds of lack of privacy and been listened to? There are also planning a roof extension, but that has already been done in the street, but only where the houses (semi detached) are on the same level. This will now give them birds eye view into our garden. From being fairly secluded, we will now be overlooked on both ground and roof level. I enclose some drawings to help try and explain. Thank you.

Here are the drawings. And they are incorrect, the second shows a gate between our house/garage and next door. Our garage is double length, built right up to the boundary wall

No drawings?

Can't see the drawings. From what you have described you could pursue under RoL but it will be expensive and difficult, particularly if what they are doing is within permitted development.;

Loss of privacy and overlooking can be valid grounds to object, but there has to be material harm resulting from it.

If the next door property is already two storey, there will already be a degree of overlooking of your rear garden. Would the additions make that overlooking materially worse? It is unlikely unless the windows are in the side of the addition, looking into your Windows

Can't see the drawings, but I thought that loss of privacy was a good reason for objection.

@idontlikealdi

Can't see the drawings. From what you have described you could pursue under RoL but it will be expensive and difficult, particularly if what they are doing is within permitted development.;

Any Right of Light issue will not stop planning being granted - it is a different area of law.

You can object to windows directly overlooking and request opaque glass but there are specific reasons to deny pp, which that would not in itself be.

Having trouble uploading the drawings. Ordinarily they can’t see our garden as the back bedroom window is next to the bathroom bay. The roof ext will have full length glass windows.

You can object on that basis (you can object on any basis you like) but it's unlikely to be considered as it's not classed as a nuisance.

I suggest you object on the basis of overlooking/loss of privacy and include lots of photos of the view from your garden to the rear of their property, including the changes in levels. I'm not sure if planning officers are necessarily doing site visits ATM due to covid.

Would it also block any light from your property if it’s above you. That’s also a valid way of objecting and may carry more weight than just privacy objections alone.

Can you contact one of your local councillors and ask what they think?
I'm a Councillor and I get a reasonable amount of planning queries. (I'm still quite new so I spend a lot of time tormenting planning officers asking what is a material planning objection and what isn't)
You can object on the grounds of loss of amenity, ie privacy to your garden. But it is also expected that anyone who lives in an urban area will have some degree of overlooking.