A clear sequence helps a renovation team coordinate surveys, approvals, opening-up work, installations and finishes. This guide sets out useful stage gates while leaving the final programme to the inspected property, agreed scope and appointed team.
Stage 1 — Feasibility and brief
For this guide topic, the feasibility and brief stage should be judged against the property itself rather than a generic national checklist. In NW London, construction, access, leasehold terms, verified designations and previous work can change the appropriate route. Confirm those points before quotes are compared or materials are ordered.
When reviewing feasibility and brief, ask for advice that is specific to the building and exact address. A useful proposal explains what has been inspected, what remains an assumption, and which parts of the work could affect cost, programme or compliance. That clarity is important for house extension and architect in any period home.
Stage 2 — Design and architect appointment
For this guide topic, the design and architect appointment stage should be judged against the property itself rather than a generic national checklist. In NW London, construction, access, leasehold terms, verified designations and previous work can change the appropriate route. Confirm those points before quotes are compared or materials are ordered.
When reviewing design and architect appointment, ask for advice that is specific to the building and exact address. A useful proposal explains what has been inspected, what remains an assumption, and which parts of the work could affect cost, programme or compliance. That clarity is important for house extension and architect in any period home.
Stage 3 — Planning application
Pre-application advice may be useful for a proposal with unresolved policy or design questions. Check the responsible authority's current service, scope and published charges before deciding whether it is proportionate for the individual project.
A conservation designation does not answer every consent question by itself. Compare the proposed work with the current official guidance and property record, and obtain address-specific advice where the effect of the work is unclear.
Stage 4 — Building Regulations submission
When reviewing building regulations submission, ask for advice that is specific to the building and exact address. A useful proposal explains what has been inspected, what remains an assumption, and which parts of the work could affect cost, programme or compliance. That clarity is important for house extension and architect in any period home.
The practical test for building regulations submission is whether it reduces uncertainty before work begins. Good preparation creates a written scope, identifies the approvals or evidence to verify, and makes clear who is responsible for each step before walls, floors or shared services are opened up.
Stage 5 — Groundworks and foundations
For this guide topic, the groundworks and foundations stage should be judged against the property itself rather than a generic national checklist. In NW London, construction, access, leasehold terms, verified designations and previous work can change the appropriate route. Confirm those points before quotes are compared or materials are ordered.
When reviewing groundworks and foundations, ask for advice that is specific to the building and exact address. A useful proposal explains what has been inspected, what remains an assumption, and which parts of the work could affect cost, programme or compliance. That clarity is important for house extension and architect in any period home.
Stage 6 — Structure and weatherproofing
For this guide topic, the structure and weatherproofing stage should be judged against the property itself rather than a generic national checklist. In NW London, construction, access, leasehold terms, verified designations and previous work can change the appropriate route. Confirm those points before quotes are compared or materials are ordered.
When reviewing structure and weatherproofing, ask for advice that is specific to the building and exact address. A useful proposal explains what has been inspected, what remains an assumption, and which parts of the work could affect cost, programme or compliance. That clarity is important for house extension and architect in any period home.
Stage 7 — First fix services
Prioritise active leaks, unsafe conditions and defects that could damage retained fabric, then record lower-priority items for monitoring. Service intervals and inspection methods should come from current instructions and the relevant system or material, not a generic area schedule.
Keep dated photographs, reports, invoices and any applicable certificates together. Clear records help future contractors understand what was observed, what was changed and which assumptions still need verification.
Stage 8 — Plastering and second fix
When reviewing plastering and second fix, ask for advice that is specific to the building and exact address. A useful proposal explains what has been inspected, what remains an assumption, and which parts of the work could affect cost, programme or compliance. That clarity is important for house extension and architect in any period home.
The practical test for plastering and second fix is whether it reduces uncertainty before work begins. Good preparation creates a written scope, identifies the approvals or evidence to verify, and makes clear who is responsible for each step before walls, floors or shared services are opened up.
Stage 9 — Fit-out and finishes
The practical test for fit-out and finishes is whether it reduces uncertainty before work begins. Good preparation creates a written scope, identifies the approvals or evidence to verify, and makes clear who is responsible for each step before walls, floors or shared services are opened up.
For this guide topic, the fit-out and finishes stage should be judged against the property itself rather than a generic national checklist. In NW London, construction, access, leasehold terms, verified designations and previous work can change the appropriate route. Confirm those points before quotes are compared or materials are ordered.
Stage 10 — Snagging and sign-off
For this guide topic, the snagging and sign-off stage should be judged against the property itself rather than a generic national checklist. In NW London, construction, access, leasehold terms, verified designations and previous work can change the appropriate route. Confirm those points before quotes are compared or materials are ordered.
When reviewing snagging and sign-off, ask for advice that is specific to the building and exact address. A useful proposal explains what has been inspected, what remains an assumption, and which parts of the work could affect cost, programme or compliance. That clarity is important for house extension and architect in any period home.
Official sources
The legislation and government guidance this page summarises. Where the two differ, the source governs.
- Building Regulations approval (GOV.UK)
Building Regulations approval is a separate consent from planning permission. This sets out the two routes.
- The Building Regulations 2010
The regulations themselves, including which work is controlled and when building control must be notified.
- Consumer Rights Act 2015
Section 49 requires a service to be performed with reasonable care and skill; section 52 requires it within a reasonable time.
Ready to discuss your project?
To arrange a site visit or request a written quote, contact us on +44 20 7101 3168. For regulated work, ask which authorisations and supporting evidence apply to the proposed scope and how they will be checked before acceptance.