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Holiday-Let EPC Upgrade Calculator UK
Holiday-let operators: cost of upgrading your FHL's EPC to a target band, with grants, occupancy-weighted running-cost saving, comfort-premium revenue uplift, and FHL capital allowance notes.
Interactive holiday-let EPC upgrade calculator
Worked example
A Cornish stone cottage, estimated band E, oil heating, booked 180 nights/yr at £140/night, targeting EPC C:
- Current band (est.)
- e
- After measures
- d
- Measure count
- 4
- Net cost
- £19350
- Running saving / yr
- £191
- Comfort uplift / yr
- £630
You'll probably want this next
Most FHL retrofits include a heat pump
Off-gas cottages in particular — check the running-cost swing and BUS grant eligibility.
Heat-pump calculator →Running a UK holiday let?
The same team that built this calculator also runs hostcare.app — cleaner scheduling, iCal sync, and guest-comms for short-term rental hosts with 1–10 properties. Free 14-day trial, no card required.
Why FHL retrofit maths are different
- Occupancy weighting. A 180-night cottage burns half the heating energy of a 360-night home.
- Comfort premium is a real revenue line. 2–5% nightly-rate uplift per band moved above D, per recent Sykes host surveys.
- Capital allowances on retrofit spend. Most measures qualify under the Annual Investment Allowance — 20%-ish further off the net cost at a typical marginal rate.
- Off-gas heating dominates rural FHLs. Oil/LPG → heat pump swings are bigger than in a mains-gas terrace. £7,500 BUS grant applies to small non-domestic in England/Wales.
- Commercial EPC methodology ≠ domestic. This calculator uses SAP-style A–G bands for simplicity; your NDEPC may differ by ~1 band. Treat outputs as directional.
Frequently asked questions
- Does MEES apply to UK holiday lets?
- It depends. A Furnished Holiday Let occupied for short stays (≤31 continuous nights, <140 days/year per property) typically needs a commercial EPC rather than a domestic one, and falls under the commercial MEES regime rather than the residential private-rented-sector rules. The floor is EPC E for commercial, with EPC C mooted for 2028 but not yet in regulation. Enforcement is much patchier than for long-let residential — but lenders, Sykes, and some OTAs are starting to require C+ for new listings.
- Why does occupancy matter for the running-cost saving?
- Because a property booked 80 nights a year burns far less heating energy than one running 260. Our model assumes ~15% of annual energy is baseline (frost-protection, cleaning-between-bookings, outbuilding loads) and the other 85% scales with your booked-nights occupancy. That means insulation + heat-pump savings are proportionally smaller for a seasonal let — still worth doing, but the comfort-premium revenue uplift often dominates the maths.
- Is the 'comfort premium' real?
- Higher-rated holiday lets do book more and at higher rates, particularly since 2023 when guest listings on Airbnb and Booking.com began surfacing energy-efficiency info prominently. Sykes Cottages' 2024 host survey found a 2–5% rate uplift for properties upgraded from D to C. We model this as 2.5% per band moved, capped at 10% total — deliberately conservative.
- Can I claim BUS on a holiday let?
- Yes. The Boiler Upgrade Scheme's eligibility rules include "small non-domestic buildings", which covers most single-unit FHL properties. A heat pump install triggers the full £7,500 grant; the MCS installer handles the paperwork. Large operators with multiple properties above a certain aggregate floor area should check with Ofgem.
- How does capital allowance work on FHL retrofit spend?
- Furnished Holiday Lets still qualify as a trading activity for capital allowance purposes (provided they meet the qualification tests — 210 available days, 105 let, etc.). Most retrofit plant and fabric qualifies under the Annual Investment Allowance, so the cost is deductible against profit in the year spent. At a 20% marginal tax rate that's a further 20% off the net cost. Check with your accountant — we surface an indicative figure but don't model your specific tax position.
- What's not in this v1?
- Seasonal tariff effects, commercial vs domestic EPC methodology differences (we use SAP-style A–G bands throughout), regional cost multipliers, real-time booking-data integration. See the expansion notes in the docs.
How this calculator works
The holiday-let calculator reuses the same cheapest-first measure stack as our MEES landlord calculator and EPC band upgrade calculator — loft top-up, LED, TRVs, cavity fill, glazing, heat pump, solid wall — stopping when the cumulative SAP-point uplift closes the gap to your target band. The difference is on the benefit side.
Running-cost saving is occupancy-weighted: 15% of your annual energy covers frost-protection, cleaning-between-bookings heating, and outbuilding loads year-round; the remaining 85% scales with booked nights ÷ 365. SAP-point improvement is then applied against that weighted figure. That's why a 250-night property sees 2–3× the running saving of an 80-night one, even with the same fabric.
Comfort premium is 2.5% of annual revenue per band moved above your starting band, capped at 10%. This reflects the well-documented tendency of higher-rated FHLs to both book more nights and command higher nightly rates, especially since 2023 when platforms started surfacing efficiency info prominently. Treat the number as defensible but directional — your actual uplift depends on region, competition, and how you market the upgrade.
What v1 doesn't model
- Seasonal tariff effects (summer electricity vs winter gas).
- True NDEPC methodology — we use SAP-style bands.
- Regional cost multipliers (Cornwall vs Scotland vs Cotswolds).
- Live booking data pulled from platform APIs — all occupancy is user-entered.
- Tax position — AIA relief is indicative; confirm with your accountant.
When this isn't the right answer
If you're a large FHL operator (10+ properties), the portfolio-level maths is different and we don't model it. If you're a long-let residential landlord, use MEES instead — enforcement risk is higher and that calculator models it. If you're thinking about solar or a heat pump specifically, those dedicated calculators go deeper on the technology-specific maths.
Related calculators
Ranked by topic overlap with this tool.
- Boiler Upgrade Scheme Grant Calculator UK — Check eligibility for the £7,500 BUS heat pump grant and see your net install cost.
- MEES Landlord Compliance Calculator UK — Landlord-focused MEES compliance check with cheapest-first measure stack and grant offsets.
- EPC Band Upgrade Cost Calculator UK — Cost of raising your EPC to band C, B or A — measure stack, grants, resale uplift and green-mortgage saving.