Design +
Architecture
Simplified.

supa-space provides fixed-price architectural design services for homeowners and developers undertaking renovations, extensions, conversions, or new builds in . We handle the design, planning, and technical drawing stages (RIBA Stages 0-4), offering clarity and cost certainty to get your project ready for construction. We are not builders, but we prepare the necessary information for you to tender the project to builders. See our Process Section for more details.

The fixed fee generated by our online calculator covers all architectural services required from initial concept through to detailed technical design ready for construction tendering (RIBA Stages 0-4). This includes brief development, concept design, planning application submission (if required), Building Regulations drawings and submission, and coordination with key consultants like structural engineers during the design phase. The specific services are listed in the calculator results.

Our calculated fixed fee specifically excludes: Third-party consultant fees (e.g., structural engineers, surveyors, party wall surveyors, planning consultants), council application fees (planning/building control), the actual cost of construction (builder's fees), services during the construction phase (RIBA Stage 5, e.g., site inspections, contract administration), or extensive involvement during handover (RIBA Stage 6). These can be provided as separate services if required.

The calculator provides a realistic estimate for our fixed architectural service fee (RIBA 0-4) based on typical project data, size, location (), and chosen quality level. The service fee calculated is fixed based on your inputs. The estimated construction cost provided for homeowner projects is a guideline only and can vary based on specific site conditions, material choices, and builder's pricing. Use the calculator to get your personalised estimate.

Our fixed fee (RIBA 0-4) is based on the initial scope defined and entered into the calculator. If the project scope changes significantly during the design process (e.g., adding another storey, substantially increasing the area), we will discuss any potential impact on the fixed fee transparently before proceeding with the changes.

Finding and appointing a builder is typically the client's responsibility. We provide a comprehensive technical design package (RIBA Stage 4 output) that you can use to get accurate quotes from builders. The management of the construction phase (RIBA Stage 5) is handled by the client and their chosen builder according to their contract.

Yes, we do offer services to support you during the construction and handover phases (RIBA Stages 5 & 6). These services are separate from the initial fixed fee calculated online (which covers RIBA 0-4). Common Stage 5/6 services include site inspections, responding to builder's technical queries (RFIs), contract administration, and handover assistance. These services are tailored to your needs and quoted separately, often on an hourly basis or via a bespoke proposal, once the construction scope and builder are known.

It's simple for the RIBA 0-4 fixed fee: 10% is due upfront to commence work. 80% is spread in equal monthly payments across the estimated duration of the design and planning phase (RIBA Stages 0-4, as shown in your estimate). The final 10% is due upon completion of the technical design package (end of RIBA Stage 4).

Our services and the cost calculator are primarily focused on projects located within Greater London .