Lawful development certificate drawings for Harrow, £539
Harrow lists different documents for a certificate of existing use and a proposed one, and asks for a site survey with the first. We draw to the row that fits your case.
- £389 drawings + £150 survey (£539 total)
- Harrow checklist rows used
- Article 4 checked first
What does a lawful development certificate pack cost in Harrow?
We charge £539: £389 for the drawings, forms and submission and £150 for the survey, with no VAT to add. Harrow Council’s certificate fee is paid to the council.
What the Harrow price covers
- A measured survey, used as the existing site survey plan Harrow lists
- Existing floor plans and elevations, plus proposed ones and site sections for a proposal
- A checklist of the evidence for works already built, with gaps flagged
- The application forms, the CIL form where it applies, and submission to Harrow
- Replies to the case officer
Existing or proposed: what Harrow asks for
Harrow’s checklist sets out a certificate of lawfulness (existing) under section 191 and a certificate (proposed) under section 192. For works already built it lists existing floor plans and elevations, an existing site survey plan, supporting information such as sworn affidavits, photographs and a planning statement (Harrow checklist).
For a proposal it lists existing and proposed floor plans and elevations, existing and proposed site sections, a site survey plan and a planning statement. For example, an owner planning a rear extension under permitted development would be on the second row, while one who built a garden room years ago would be on the first.
Fee and CIL on a Harrow certificate
On the same checklist the fee for a proposed certificate is 50% of the application fee, and the CIL form is marked as needed where the development is clearly greater than 100 m2 in area. The existing-works row carries the application fee in full.
The Mayor’s levy only bites on larger schemes, so most householder certificates owe nothing. We tell you early if yours could be over the line.
Article 4 and conservation areas in Harrow
Harrow has 30 conservation areas (Harrow conservation areas). In Pinner the council’s table marks an Article 4 direction for five of them (Pinner table), and five more on Harrow on the Hill (Harrow on the Hill table).
A proposed certificate cannot confirm permitted development where those rights have been removed. For example, a loft dormer in Mount Park Estate would need an application rather than a certificate, so we check the address before drawing.
Harrow decided 657 of 695 householder applications inside 8 weeks in the year to June 2026. Certificates are separate and we cannot promise a date.
Harrow certificate applications in numbers
- Section 191
- The section of the 1990 Act Harrow’s checklist names for a certificate of existing lawful use or development. Harrow: national and local validation checklist, February 2024
- Section 192
- The section Harrow’s checklist names for a certificate of proposed use or development. Harrow: national and local validation checklist, February 2024
- 50%
- Share of the application fee that Harrow’s checklist lists as the fee for a proposed certificate. Harrow: national and local validation checklist, February 2024
- 100 m2
- Size above which Harrow’s checklist marks the CIL form as needed for a proposed certificate. Harrow: national and local validation checklist, February 2024
- 30
- Conservation areas in Harrow. Harrow: conservation areas and Article 4 pages
- 10
- Pinner and Harrow on the Hill conservation areas marked with an Article 4 direction on Harrow’s tables. Harrow: Pinner conservation areas
- 657 of 695
- Harrow Council householder applications decided within 8 weeks in the year to June 2026, out of all it decided (prior approvals not counted). MHCLG live table PS2, planning application statistics by district, July 2025 to June 2026 (GOV.UK)
- £72.73 per m²
- The Mayor of London’s CIL in Harrow (band 2) for permissions granted in 2026, owed only when a scheme is liable for CIL in the first place. Mayoral CIL: annual rate summary for 2026, Table 1 (Greater London Authority)
Harrow certificate questions
What does Harrow want for a certificate of existing development?
Existing floor plans and elevations, a site survey plan, evidence such as sworn affidavits, photographs and a planning statement.
What does it want for a proposed one?
Existing and proposed plans and elevations, site sections, a site survey plan and a planning statement.
Is the fee the same for both?
No. Harrow’s checklist lists 50% of the application fee for a proposed certificate.
Will my Pinner home qualify?
Not if its conservation area carries an Article 4 direction that removes the right. We check the address first.
Other services people book with this one
- Rear extension drawings£439 drawings + £150 survey (£589 total)
- Loft conversion drawings£439 drawings + £150 survey (£589 total)
- Prior approval for a larger home extension£349 drawings + £150 survey (£499 total)
- Householder planning drawings£479 drawings + £150 survey (£629 total)
- Building regulations drawings£479 drawings + £150 survey (£629 total)
Price your Harrow certificate
Send the address and what was built or planned. We say whether a certificate fits and quote a fixed fee.