Frequently Asked Questions

1. What is airspace development?

Airspace development is the process of adding one or more new homes above an existing residential building — typically by constructing new floors on the rooftop.
It allows value to be unlocked from unused roof space while enhancing the building itself through new roofs, improved communal areas, and modernised facilities.

2. Why should I consider airspace development for my building?

It’s one of the most effective ways to unlock hidden value without selling the whole property or disrupting residents’ homes.
Funds from the development can be used to carry out building upgrades, reduce future maintenance costs, and enhance the long-term performance and appearance of the property.

3. How disruptive will the works be for existing residents?

We carefully plan and manage every project to minimise disruption.
Where possible, we use modern methods such as off-site or modular construction to shorten build time and reduce on-site noise.
Clear communication and considerate scheduling mean residents can continue their day-to-day lives throughout the process.

4. Will the service charge go up for existing residents?

Not necessarily. In many cases, the new homes contribute proportionately to shared running costs, which can help stabilise or even reduce service charges for existing owners.
Additionally, building improvements (new roof, upgraded access areas, improved façade) can lower maintenance costs over time.

5. Is the building structurally capable of supporting additional floors?

We carry out full structural and technical feasibility studies before any agreement is made.
If the building cannot safely support additional weight, the project would not proceed.
All schemes are designed and reviewed by qualified structural engineers to ensure compliance and long-term stability.

6. How long does a typical airspace development take?

Project timelines vary depending on local planning policies and design complexity.
On average, you can expect:

• Feasibility & planning: around 6–9 months

• Construction & completion: around 9–12 months

If an off-site modular solution is feasible, the time on site can often be reduced to as little as 3–6 months, significantly minimising disruption for residents and neighbours.
Exact timescales are confirmed after the initial rooftop assessment and planning review.

7. If I choose to sell the airspace outright, when will I receive payment?

If you choose the outright purchase route, payment is typically made shortly after planning consent is granted and legal formalities are completed.
This provides a quick and straightforward way to release capital without taking on any development risk.

8. If I choose the joint-venture route, what kind of return can I expect?

Our joint-venture model allows you to share directly in the profits from the completed development.
While it takes longer than an outright sale, you will hold the larger share of the profit, reflecting your ownership of the building and the airspace rights.
We fund and manage everything from design and planning to construction and sale, ensuring full transparency throughout.

9. What guarantees and warranties will be provided once the development is complete?

Every new home we build is covered by a 10-year structural warranty and delivered with full Building Control sign-off and compliance certificates.
We also provide a new roof warranty and ensure that communal areas and services are upgraded and fully certified upon completion.

10. Can existing residents stay in their flats during the build?

Yes — they absolutely can and will stay in their flats.
Our developments are designed and managed so that residents can remain safely in their homes while works take place.
We carefully plan site logistics, maintain access to all areas, and communicate clearly with residents throughout the process.

11. What makes BB Airspace different from other developers?

We focus solely on rooftop and airspace development, bringing a blend of technical, commercial and design expertise rarely found in one place.
Our approach is transparent and partnership-led — we align with freeholders’ goals, fund all pre-planning costs, and deliver building improvements that add long-term value for everyone involved.

12. Who owns the new homes once the project is complete?

Ownership depends on the structure of the agreement:

• In an outright sale, BB Airspace purchases the airspace and becomes the developer and owner of the new units.

• In a joint venture, ownership is shared based on agreed profit or equity splits, with proceeds distributed after completion and sale.
All ownership and legal arrangements are defined clearly within the contract before works begin.

13. How do I know if my building is suitable for airspace development?

We offer a free initial feasibility assessment.
Our team reviews planning history, structural layout, and roof configuration to determine whether your building is a strong candidate.
You’ll receive a summary of development potential, likely unit mix, and commercial options — all at no cost or obligation.