Hello everyone,
we are just starting to consider adding a rooftop terrace. Here are the details:
- Single-family house, rooftop terrace already exists and was built over the carport, living room, and a storage room for garden tools (solid construction)
- Roof is flat and sealed with bitumen membranes
- There is no building permit/planning permission for the rooftop terrace, so this would need to be obtained beforehand
We have spoken with an architect who offered the following:
1) Review, integration, site visit
2) Evaluation and updates
3) Draft design preparation
4) Permit/planning approval including any variances
Total cost: 4300€
Photos of the terrace and drawings are attached. The terrace photo is not ideal, so I will upload more later.
We would like to have the terrace resealed and the slope adjusted (currently there are puddles forming) — meaning all necessary surface work, then terrace slabs installed. A railing will be required as well as a small sun terrace at the doors leading to the terrace. A lighting concept is also needed.
Now my questions:
1) Would you get multiple quotes from architects?
2) How do you evaluate this offer?
3) Should separate quotes be obtained for different work stages, or should everything be done in one go?
4) What costs can be expected for a project like this?
I am still quite "lost" with this topic and not sure what the right approach is 🙂. Additionally, there are some questions we need to clarify ourselves (usage concept, lighting concept, etc.).


we are just starting to consider adding a rooftop terrace. Here are the details:
- Single-family house, rooftop terrace already exists and was built over the carport, living room, and a storage room for garden tools (solid construction)
- Roof is flat and sealed with bitumen membranes
- There is no building permit/planning permission for the rooftop terrace, so this would need to be obtained beforehand
We have spoken with an architect who offered the following:
1) Review, integration, site visit
2) Evaluation and updates
3) Draft design preparation
4) Permit/planning approval including any variances
Total cost: 4300€
Photos of the terrace and drawings are attached. The terrace photo is not ideal, so I will upload more later.
We would like to have the terrace resealed and the slope adjusted (currently there are puddles forming) — meaning all necessary surface work, then terrace slabs installed. A railing will be required as well as a small sun terrace at the doors leading to the terrace. A lighting concept is also needed.
Now my questions:
1) Would you get multiple quotes from architects?
2) How do you evaluate this offer?
3) Should separate quotes be obtained for different work stages, or should everything be done in one go?
4) What costs can be expected for a project like this?
I am still quite "lost" with this topic and not sure what the right approach is 🙂. Additionally, there are some questions we need to clarify ourselves (usage concept, lighting concept, etc.).
Nuyshen schrieb:
@SaniererNRW123
Yes, I know exactly what you mean. Therefore, we still need a realistic usage concept. The roof terrace adjoins the two children's bedrooms, so this could be a potential future use scenario. Of course, it also gets sunlight all day. However, the roof terrace currently just doesn’t look good; furthermore, puddles form, the bitumen membranes bake in the sun, and there is a slight chemical smell.
...I have a simple solution to offer: extensive green roof—done. No problems, only advantages (roof covering lasts twice as long, looks better, requires less structural load compared to a terrace, etc.)P.S. Site plan without labeling and dimensions? That’s really not any better yet 😉
S
SaniererNRW12319 Oct 2022 16:02Nuyshen schrieb:
Yes, I understand exactly what you mean, so we still need a realistic usage concept. The roof terrace adjoins the two children's bedrooms, which could be a possible usage scenario in the future.How about a green roof with fall protection? And if the kids want to go outside later, garden chairs and a grill can be placed there. Then it’s no longer a roof terrace 😉@i_b_n_a_n: You were faster
Ok, that could be an idea; I would need to read up on that. Do I not need a building permit / planning permission for a fall protection system?
@i_b_n_a_n – can you show me an example of what document I can submit? At the moment, I don’t have any "better" ones, just the roof plan view with all dimensions as shown in post 1.
@i_b_n_a_n – can you show me an example of what document I can submit? At the moment, I don’t have any "better" ones, just the roof plan view with all dimensions as shown in post 1.
i_b_n_a_n schrieb:
I have a simple solution to offer: extensive green roofing – done. No problems, only benefits (roofing membrane lasts twice as long, looks better, requires less structural load than a terrace, etc.)And especially if there is a nursery next door that you can commission to handle the planting.To me, it looks like your building already extends into the neighbors’ setback areas. Good relationships aside, I don’t believe the nursery would give up the buildability of their own land to your disadvantage without reason.
S
SaniererNRW12319 Oct 2022 16:20Nuyshen schrieb:
Do I need a building permit / planning permission for a fall protection system?This can vary depending on the federal state or region. A fall protection system, such as a fence, could also be considered a permitted enclosure since it is not a structure. If in doubt, you can create mounting fixtures during landscaping and, if necessary, install a small 90cm (35 inches) fence at the appropriate time.I am a pragmatist and would just keep it simple...
W
WilderSueden19 Oct 2022 16:44i_b_n_a_n schrieb:
I have a simple solution to offer: extensive green roofing – problem solved. No issues, only benefits (the roof membrane lasts twice as long, it looks better, and it requires less load capacity than a terrace, etc.)However, you should not underestimate the load requirements of green roofing. As a rule of thumb, 1cm of substrate equals a roof load of 10 kilograms per square meter (2.1 pounds per square foot). Minimal extensive green roofs can have a substrate depth of 6cm (2.4 inches), but in hot, dry summers, even plants adapted to such extreme conditions may suffer significant losses. I would not recommend anything less than 10cm (4 inches), preferably more.Similar topics