Cornish Gems Killifreth Stamps
An 1880 Cornish mine engine house converted into a four-floor holiday home with a rewilded garden and heat recovery ventilation.
Google reviews
Google rating · 4.1/5 · 55 reviews
Stored Google rating; this is separate from the Accommodation Eco Score or Throne Score. The current Google rating may have changed.
Read reviews on Google MapsAbout Cornish Gems Killifreth Stamps
Environmental evidence and weighted assessment
3.1/5 Accommodation Eco Score · Evidence coverage 100% · Evidenced performance 52.5%
Green flags
- Energy and climate, level 3/4.
The property page lists heat pump or heat battery hybrid heating, underfloor heating, LED bulbs, zoned thermostats and an MVHR heat recovery system.
Source · 2026-10-29 - Buildings, heritage reuse and land use, level 3/4.
An original 1880 engine house sensitively renovated, keeping its stonework, with triple glazing and timber window frames listed.
Source · 2026-10-29
| Pillar | Weight | Level and what it means | Contribution | Evidence, quote and source |
|---|---|---|---|---|
| Nature, biodiversity and regeneration | 30% | 2/4 · A named area of habitat kept undisturbed, or one named native planting or conservation activity | 15 / 30 points | A rewilded garden area with regional planting, a bird table and bug hotel, and hedge gaps for hedgehogs, per the property page. Source · 2026-10-29 |
| Energy and climate | 15% | 3/4 · Several systems, such as on site renewables plus at least 80% LED lighting, natural ventilation and metered monitoring; the stay's own vehicles and boats count here | 11.25 / 15 points | The property page lists heat pump or heat battery hybrid heating, underfloor heating, LED bulbs, zoned thermostats and an MVHR heat recovery system. Source · 2026-10-29 |
| Water | 10% | 2/4 · One specific system, such as rainwater harvesting, greywater reuse, or taps and showers at or under 8.5 litres a minute | 5 / 10 points | Dual flush or low-flow toilets and drought-tolerant planting are listed. Source · 2026-10-29 |
| Waste and plastic | 10% | 2/4 · One specific system, such as composting all organic waste or sorted recycling | 5 / 10 points | The agency states plastic toiletry bottles have been eliminated from its properties, and the page lists reduced cleaning chemicals and a cafetiere option instead of pods. Source · 2026-10-29 · Corroborating source |
| Food, farming and sourcing | 15% | 1/4 · Claim only, such as local or organic with no named source | 3.75 / 15 points | The welcome gift uses mainly local suppliers. Self-catering. Source · 2026-10-29 |
| Buildings, heritage reuse and land use | 15% | 3/4 · Several practices, such as reuse of existing structures, local natural materials, passive design and a small footprint on the land | 11.25 / 15 points | An original 1880 engine house sensitively renovated, keeping its stonework, with triple glazing and timber window frames listed. Source · 2026-10-29 |
| Measurement, transparency and certification | 5% | 1/4 · General commitments without specifics or results | 1.25 / 5 points | The letting agency Cornish Gems Limited, which manages and services the home, states it has been a certified B Corp since January 2024 with a score of 97.0. This is an agency-level certification, not a property audit, so it is capped at level 1. Source · 2026-10-29 |
Throne Standard for stays 2.2. Accommodation Eco Score weights: Nature, biodiversity and regeneration 30%, Energy and climate 15%, Water 10%, Waste and plastic 10%, Food, farming and sourcing 15%, Buildings, heritage reuse and land use 15%, Measurement, transparency and certification 5%. Each pillar earns its weight times its level divided by four. The score is 1 plus 4 times the evidenced performance, shown to one decimal, so 0% is 1.0 and 100% is 5.0. A pillar the stay does not disclose, after we read its own pages, counts as 0 and is shown as Not disclosed, with every page we read linked, because silence is an answer too. Every finding quotes its source word for word. Below 85% coverage, below 70% performance, or with less than half the weight at level 2 or above, the score is held under the next whole number (3.4 or 2.4). A 5.0 band needs 90% coverage and performance, level 4 evidence on half the weight and the key pillar at level 3 or above. Green flags are pillars at level 3 or 4. Every level can be earned from public, dated evidence; no score requires a visit. Evidence must be rechecked within two years. Guest travel is not scored; everyone gets there how they can.
Purity, what touches your body
1.6/5 Purity Score · Evidence coverage 100% · Evidenced performance 15%
| Pillar | Weight | Level and what it means | Contribution | Evidence, quote and source |
|---|---|---|---|---|
| Water you drink and bathe in | 25% | 0/4 · Not disclosed on the stay's own pages | 0 / 25 points | Not disclosed on the stay's own pages, checked 2026-11-03. Page read · 2026-11-03 · Page read |
| Food on your plate | 20% | 1/4 · Claim only, such as fresh or organic with no named source | 5 / 20 points | The property sustainability list says mainly local suppliers are used for the welcome gift, which is a claim only. “Mainly local suppliers used for the WG (reduced food miles)” Source · 2026-11-03 |
| Grounds and pest control | 15% | 1/4 · Claim only | 3.75 / 15 points | The property page describes a rewilded garden with local planting and wildlife friendly spaces, but no spray policy. “flourishing gardens filled with local planting and wildlife-friendly spaces that bring you gently back to nature” Source · 2026-11-03 |
| Cleaning, laundry and fragrance | 15% | 1/4 · Claim only, such as eco friendly products | 3.75 / 15 points | The property sustainability list says cleaning chemicals are reduced, with no products named. “Sustainability/ responsibility info given to guests Reduced cleaning chemicals” Source · 2026-11-03 |
| Linen, towels and mattresses | 10% | 0/4 · Not disclosed on the stay's own pages | 0 / 10 points | Not disclosed on the stay's own pages, checked 2026-11-03. Page read · 2026-11-03 · Page read |
| Air and quiet | 10% | 1/4 · Claim only | 2.5 / 10 points | The property page says a mechanical ventilation system with heat recovery supplies filtered fresh air, which is a mechanical system and not natural ventilation. “providing fresh filtered air into the building whilst retaining most of the energy that has already been used in heating” Source · 2026-11-03 |
| Pool and bathing water | 5% | 0/4 · Not disclosed on the stay's own pages | 0 / 5 points | Not disclosed on the stay's own pages, checked 2026-11-03. Page read · 2026-11-03 · Page read |
Throne Standard for stays 2.2. Purity Score weights: Water you drink and bathe in 25%, Food on your plate 20%, Grounds and pest control 15%, Cleaning, laundry and fragrance 15%, Linen, towels and mattresses 10%, Air and quiet 10%, Pool and bathing water 5%. Each pillar earns its weight times its level divided by four. The score is 1 plus 4 times the evidenced performance, shown to one decimal, so 0% is 1.0 and 100% is 5.0. A pillar the stay does not disclose, after we read its own pages, counts as 0 and is shown as Not disclosed, with every page we read linked, because silence is an answer too. Every finding quotes its source word for word. Below 85% coverage, below 70% performance, or with less than half the weight at level 2 or above, the score is held under the next whole number (3.4 or 2.4). A 5.0 band needs 90% coverage and performance, level 4 evidence on half the weight and the key pillar at level 3 or above. Green flags are pillars at level 3 or 4. Every level can be earned from public, dated evidence; no score requires a visit. Evidence must be rechecked within two years.
People, ownership, work and community
1.9/5 People Score · Evidence coverage 100% · Evidenced performance 21.3%
| Pillar | Weight | Level and what it means | Contribution | Evidence, quote and source |
|---|---|---|---|---|
| Ownership and control | 30% | 1/4 · Ownership stated without detail | 7.5 / 30 points | The operator sustainability statement says the company is independently owned and local, which covers the whole group and names no owner of this home. “As an independently owned local company, Cornish Gems recognises the importance of meaningful environmental responsibility.” Source · 2026-11-03 |
| Local work and fair pay | 25% | 1/4 · Claim only, such as local staff | 6.25 / 25 points | The operator sustainability statement mentions Real Living Wage accreditation for the company as a whole, so it is a group wide statement. “accredited and are proud to have helped Cornwall achieve Real Living Place accreditation in early 2025.” Source · 2026-11-03 |
| Community benefit | 20% | 1/4 · Claim only | 5 / 20 points | The operator sustainability statement says the company supports Cornish charities and trusts, a group wide statement. “we support charities and Trusts that provide vital services to the people and landscapes of our community” Source · 2026-11-03 |
| Access to beach and land | 15% | 0/4 · Not disclosed on the stay's own pages | 0 / 15 points | Not disclosed on the stay's own pages, checked 2026-11-03. Page read · 2026-11-03 · Page read |
| Culture and heritage | 10% | 1/4 · Claim only | 2.5 / 10 points | The operator sustainability statement says the company champions local producers and makers, a group wide statement. “We contribute to Cornwall’s circular economy by championing local producers, makers and businesses.” Source · 2026-11-03 |
Throne Standard for stays 2.2. People Score weights: Ownership and control 30%, Local work and fair pay 25%, Community benefit 20%, Access to beach and land 15%, Culture and heritage 10%. Each pillar earns its weight times its level divided by four. The score is 1 plus 4 times the evidenced performance, shown to one decimal, so 0% is 1.0 and 100% is 5.0. A pillar the stay does not disclose, after we read its own pages, counts as 0 and is shown as Not disclosed, with every page we read linked, because silence is an answer too. Every finding quotes its source word for word. Below 85% coverage, below 70% performance, or with less than half the weight at level 2 or above, the score is held under the next whole number (3.4 or 2.4). A 5.0 band needs 90% coverage and performance, level 4 evidence on half the weight and the key pillar at level 3 or above. Green flags are pillars at level 3 or 4. Every level can be earned from public, dated evidence; no score requires a visit. Evidence must be rechecked within two years.
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These source pages were captured on 2026-10-02. Capturing a page does not establish a rating or verify its claims. Only the reviewed pillar evidence above earns assessment points. Missing findings remain unavailable.
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