Acoustic secondary glazing is the highest-ROI improvement a London landlord can make. Boost rental yield by 8–15%, improve your EPC by 1–2 bands, and cut tenant turnover — all from a single, no-planning-permission installation.
A single improvement that impacts four key metrics: rent, retention, energy performance, and property value.
Properties with acoustic glazing command 8–15% higher rents in noise-affected London postcodes. Tenants actively search for 'quiet flats' on Rightmove.
Noise is the #1 reason tenants leave London rentals. Secondary glazing cuts void periods by an average of 3 weeks per year.
Secondary glazing improves thermal performance from ~5.0 to ~1.8 W/m²K, typically boosting your EPC by 1–2 bands — critical for the 2028 Minimum Energy Efficiency Standards (MEES).
Internal installation means no leaseholder consent headaches, no freeholder disputes, and no conservation area restrictions in most cases.
The proposed Minimum Energy Efficiency Standards (MEES) will require all rental properties to achieve EPC C by 2028. Non-compliance penalties: up to £5,000 per property.
Common in single-glazed Victorian conversions
Typical for Edwardian terraces with original sash windows
Achievable with secondary glazing + draught sealing
Adjust the sliders to match your property. See exactly how secondary glazing pays for itself.
Total Investment
£3,900
Payback Period
13 months
5-Year ROI
384%
Return on investment over 5 years
Estimates based on London market averages. Actual results vary by location, property type, and current condition. Rent uplift based on Rightmove/Zoopla comparable data for noise-affected vs quiet postcodes.
We offer tiered pricing for landlords with portfolios. The more windows, the lower the per-unit cost.
Up to 15 windows
£650/window
16–40 windows
£580/window
40+ windows
£520/window
All prices include survey, manufacture, installation, and VAT. 10.8 mm Stadip Silence acoustic glass as standard.
Window improvements are a landlord responsibility under the Landlord and Tenant Act 1985 (Section 11). Secondary glazing is classified as an improvement, not a repair, so you can claim capital allowances against rental income.
Yes. Secondary glazing qualifies as a capital improvement and can be offset against Capital Gains Tax when you sell. If installed as part of an energy efficiency improvement, you may also qualify for the Landlord Energy Saving Allowance (LESA) of up to £1,500 per dwelling.
The UK Government's proposed MEES regulations require all rental properties to achieve EPC C by 2028. Secondary glazing typically improves thermal performance by 1–2 EPC bands, making it one of the most cost-effective upgrades for period properties where cavity wall insulation isn't possible.
Most landlords see full ROI within 18–36 months through a combination of higher rent, reduced void periods, lower energy bills, and avoided EPC compliance penalties (currently up to £5,000 per property).
Yes. Installation takes 1–2 hours per window with no external access required. There's minimal disruption — most tenants continue working from home during installation.
Secondary glazing is an internal, reversible modification. Most leases permit internal improvements without consent. However, we recommend checking your lease terms — we can provide a specification letter for your freeholder if required.
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