JM Design Limited

Founded 2023 by a Guernsey College of Further Education-trained designer (HNC Construction and the Built Environment, 2016) with a decade's prior experience at a local practice. Small home extensions through to residential developments and commercial briefs. Not RICS-regulated. 17 applications as agent 2022-2025.

A considered design approach to architecture, tailored to suit your project.

JM Design Limited’s own words, from jmdesign.gg . Quoted as published — this site neither vets nor endorses any firm.

Images published by JM Design Limited on their own website.

The properties they work on

Of 17 applications this firm filed, 9 are tied to a later recorded sale of the same address, and 9 of those carry a real price. The midpoint is £669,588, each carried forward to 2026 money at the island index. Most of their filed work is in St Sampson (6), St Peter Port (4), Castel (3).

Matching is by address and parish against the States register, not a shared ID, so a shared house name can mismatch. It tells you the value bracket this firm operates in; it is not their fee and not a claim about any individual job.

Work-type mix

Classified from each application's own description text, most common first — the same keyword model this site's planning cost estimates use. Select a type to filter the applications below.

Typical cost of work

£34,417–£65,833 average, estimated per application from its own description text using this site's planning cost model — a rough guide only, not a quote from JM Design Limited or a reflection of what any specific job actually cost, and it does not include design fees. Each row below also carries an estimate at the prices of the year it was filed, deflated with the island house-price index — a proxy, since that index tracks house prices rather than construction costs and the two genuinely diverge (materials spiked in 2021–22 well beyond house-price growth). No Guernsey construction-cost index is published, so this is the best basis available, and it is an estimate on top of an estimate. 2 demolish-and-rebuild applications excluded from the average — that category prices per m² of the rebuild, which isn't recorded per application here.

17 planning applications as agent — real cross-references

Success rate on decided applications: 94% granted (15 granted, 1 refused, of 16 decided — pending/withdrawn excluded)