Which reports a micro-brewery in an industrial unit needs

A micro-brewery moving into an industrial unit usually needs five or six supporting documents rather than the one or two the landlord's agent suggests. The brewery planning reports for an industrial unit normally cover odour, plant noise, foul drainage, servicing and waste, on top of a short planning statement explaining the use. Whether you need a change of use application at all depends on the unit's lawful use and on how much of the floor you give to the taproom.

Start with the lease plan and the planning history, not the brewing kit.

Use class for brewing, and the taproom question

Brewing is industry. Where the process can be carried on in a residential area without detriment to amenity, it falls within Class E(g)(iii) light industrial. Where it cannot, because of the odour from the boil and the spent grain, the chiller noise or the delivery pattern, it is Class B2 general industry. Most commercial brewkits above a few hectolitres per batch land in B2 in practice, and officers tend to treat the odour question as the deciding one.

That matters because the unit you are taking may be consented for E(g) or for B8 storage and distribution. Moving from storage into general industry is a material change of use and needs permission. Moving within Class E needs none.

The taproom is the part that catches people out. A drinking establishment has been a sui generis use since the Use Classes Order was amended in 2020, so it sits outside every class and any change into it needs express permission. A small tasting area that is properly ancillary, open only when the brewery is open and subordinate to production, can be treated as part of the brewing use. A 60 cover bar open Thursday to Sunday with the brewery running two days a week is the main use dressed up as an ancillary one, and an officer will say so.

Draw the floor areas. Put production, cold store, packaging and taproom on a plan with square metres against each, and state the hours of each. That single drawing resolves more argument than any amount of narrative.

Odour from the boil and from spent grain

Odour is the reason breweries get refused, and it has two sources. The wort boil produces a warm, sweet, cereal odour vented through a stack or louvre. Spent grain sitting in a skip or tote in a yard produces a sour, fermented odour within a day or two in warm weather, and that is the one neighbours complain about.

Expect to submit an Odour Assessment where there are sensitive receptors within a few hundred metres, and a ventilation and extraction statement describing the discharge arrangement. The Institute of Air Quality Management publishes the odour assessment guidance that most consultants and environmental health teams work to, and it expects a source inventory, a receptor survey, an assessment of the effect and a mitigation scheme.

Practical mitigation that reads well in an application:

1. Discharge the boil vent at roof level, above the eaves of the nearest building, vertically and uncapped.
2. Condense the vapour before discharge where the kit allows it, which cuts both odour and plume visibility.
3. Store spent grain in sealed totes inside the unit, not in an open skip in the yard.
4. Commit to a collection frequency, in writing, and name the route the farm or merchant takes it on.
5. Keep the shutter door closed during the boil, with mechanical make-up air instead.

Plant noise and refrigeration

Glycol chillers, condensers, keg washers and extraction fans run outside production hours and often all night. Assessment is normally by the method in BS 4142:2014+A1:2019, which compares the rating level of the specific sound, with any acoustic feature correction for tonality or intermittency, against the measured background sound level at the nearest noise sensitive receptor.

A Noise Impact Assessment for a brewery needs a background survey covering the quietest period the plant will run in. That usually means an overnight measurement, not a daytime spot reading, because the chiller cycling at 03:00 against a low background is where the complaint comes from. Get the manufacturer's sound power data for each unit before the survey rather than after it.

Where the unit backs onto housing, acoustic louvres, an enclosure, or simply relocating the condenser to the far elevation will do more than any report. The consultant should price the mitigation into the design, then show the predicted rating level with it in place.

Trade effluent and the water company

Brewery effluent is strong. It carries high organic load, spent yeast and cleaning chemicals, and discharging it to the public sewer without consent is an offence. You need a trade effluent consent from the sewerage undertaker under section 118 of the Water Industry Act 1991, which is a separate process from planning and runs on its own timetable.

Planning still cares, for two reasons. The local planning authority may ask for a Foul Sewage Assessment where the discharge is materially different from the previous occupier's, and the undertaker may object to an application if capacity is a problem. Apply for the consent early and mention it in the planning submission. An application that says the consent is being pursued, with a reference number, closes off a line of objection.

If balancing or pH correction plant is needed, it takes floor area and may itself be noisy. Show it on the plan at the start.

Deliveries, dray access and parking

Malt arrives on a pallet, sometimes in bulk. Kegs and cans leave on a dray or a van. Spent grain leaves in a trailer. Each of those is a vehicle movement into an estate road that may already be tight.

A full transport assessment is only triggered by larger schemes, and the thresholds that bring one into play sit in the national guidance and the local plan. A brewery fit-out in an existing unit will more often need a short transport statement, or no transport document at all. What the highway authority does want is a swept path drawing showing the largest expected vehicle turning within the site, and a servicing statement giving delivery times and frequency. If the taproom draws evening visitors, parking accumulation becomes the issue instead, and the approach is much the same as it is for a nursery change of use where arrivals cluster.

Waste, hours and the submission pack

Spent grain is the largest waste stream by weight and the most sensitive by odour. A Waste Management Strategy should set out storage location, container type, collection frequency and the destination for grain, trub, yeast and packaging. Where cans and kegs are washed on site, say where the wash water goes.

Hours deserve their own paragraph in the planning statement. Separate production hours, delivery hours and taproom hours, and offer each as a condition. Officers who are nervous about a drinking use in an industrial estate will often grant with tight taproom hours and a review, and a temporary or personal permission is worth considering if the alternative is a refusal.

An illustrative example. A 10 barrel brewery with a 40 cover taproom takes a B8 unit on an estate 80 metres from housing. The pack runs to a planning statement with floor areas and hours, an odour assessment, a ventilation and extraction statement, a noise impact assessment with an overnight background survey, a foul sewage assessment referencing the trade effluent application, a waste management strategy, and servicing and swept path drawings. Seven documents, and the odour and noise work is where the money goes. Figures here are illustrative and your own site will differ.

Two points on who prepares what. An Odour Assessment and a Noise Impact Assessment are reports councils usually expect from a suitably qualified author, and professional review is strongly advised. The measurement and modelling behind them is not something to improvise. The planning statement, waste strategy and extraction statement are more readily drafted in house and then checked.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. Enter the unit postcode on PlanScope to see which of the 66 reports the constraint check flags for your site, and start with a draft you can send to the specialists.

PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.