A first viewing is for deciding whether to go back. A second viewing is the one worth taking a few minutes' longer over, once the estate agent's patter and the staged photos have worn off enough to actually look at the building rather than the styling. None of what's below is a substitute for a proper survey — it's what narrows down what to ask the agent, what to photograph for later, and occasionally what to walk away from before paying for one.
Everything here fits a coat pocket or a small bag. Nothing needs charging overnight, pairing to a phone, or a manual to operate — a viewing is not the moment to be fiddling with an app while an agent waits by the front door. Most of it earns its place doing a second job well beyond this one house, which is the honest reason to actually buy rather than borrow it.
Here's what I'd take, job by job.
The one I’d take first
Brennenstuhl Moisture Detector MD
A five-second press against a wall or skirting turns “feels a bit damp” into an actual number, and a patch of fresh paint in one corner of an otherwise tired room is exactly the kind of thing worth pressing a meter against before asking the agent about it. Pin-type, pocket-sized, no calibration or manual needed — point it, press it, read the traffic-light LEDs.
Typically £15–£20
Check price on AmazonHow I’d prioritise a viewing kit
A reading is a flag, not a diagnosis. A high number on a damp meter means “ask why,” not “damp proofing needed” — it can’t tell you if it’s rising damp, a leaking gutter or condensation from a shower with no extractor fan. Working out which is what a survey is for.
Discretion beats capability. A lab-grade moisture meter or a full-size pair of binoculars looks odd pulled out in front of an agent and the sellers. Everything here fits a coat pocket, takes seconds to use, and doesn’t need explaining.
One reading rarely proves anything alone. A single damp reading, one room’s dimensions, one compass bearing — treat each as a data point worth mentioning to a surveyor later, not evidence to negotiate on by itself.
None of this replaces a survey. A second viewing with a damp meter and a torch might tell you a house is worth pursuing, or worth walking away from — it won’t tell you about the roof structure, the foundations or what’s behind a wall. That’s what a HomeBuyer Survey is for, once there’s an offer worth protecting.
The comparison
| Product | Job | Typical price | Best for | |
|---|---|---|---|---|
| Brennenstuhl Moisture Detector MD | Damp and staining | ~£15–£20 | A number instead of a guess | View |
| Bosch Zamo (4th gen) | Room dimensions | ~£40–£55 | Quick, one-button room sizes | View |
| Stanley FatMax 8m | Doorways and alcoves | ~£20–£28 | Where a laser can’t bounce cleanly | View |
| Energizer Vision Ultra HD | Lofts, cellars, dark corners | ~£15–£22 | Hands free where the light switch doesn’t reach | View |
| Occer 12x25 compact | Roofline from the garden | ~£25–£35 | Small enough to not feel out of place | View |
| Suunto A-10 NH Compass | Garden and room orientation | ~£18–£25 | A real bearing, no app or signal | View |
| Draper 34279 13A | Quick electrical check | ~£10–£16 | Cheapest item here | View |
| Rite in the Rain No. 135 | Notes on the spot | ~£6–£9 | Discreet, no battery to go flat | View |
Damp and staining
Brennenstuhl Moisture Detector MD
Best overall — the one I’d take first; my top pick above
Fresh paint in one corner of a tired-looking room, a slightly musty smell under a bay window, a patch of wallpaper that’s a shade too new — a damp meter turns a hunch into a reading in the time it takes to press two pins against the surface. It won’t say what’s causing a high reading, only that one’s there, which is enough to make a mental note or a photo before moving on. More detail on pin versus pinless meters, and the professional-grade alternatives, is in the damp meters guide.
For
- A number instead of an impression, in five seconds
- Pocket-sized, no calibration or manual needed
- Cheap enough not to think twice about carrying
Against
- Pin-type only — leaves two small marks in paint or plaster
- A relative reading, not a lab-grade percentage
Typically £15–£20
Check price on AmazonWill the furniture fit
Bosch Zamo laser measure (4th generation)
Best for quick room dimensions — point, click, done
A room that photographs generously in a listing can measure up smaller than expected in person, and a laser measure settles it in the time it takes to point it at the far wall — useful before falling for a bedroom that won’t actually take the bed already owned. The Zamo is a single-button unit with no Bluetooth or app to fuss with mid-viewing, accurate to a few millimetres well beyond anything a room needs. Pricier professional models with floor-plan apps and Bluetooth logging are in the laser measures guide.
For
- One-button operation, nothing to pair or charge mid-viewing
- Accurate well beyond what checking a room needs
Against
- Struggles in bright sunlight through south-facing glass
- No memory function to add measurements together
Typically £40–£55
Check price on AmazonStanley FatMax 8m tape measure (0-33-728)
Best for doorways, alcoves and anywhere a laser can’t get a clean bounce
A laser needs a flat surface to bounce off and a clear line of sight; a tape measure doesn’t care. This is the one for checking a doorway will actually take a wardrobe through it, an alcove for a fridge, or the gap behind a radiator a laser reads awkwardly or not at all. A wide blade with enough standout to measure alone, no second pair of hands needed — more in the tape measures guide.
For
- Works in awkward angles and corners a laser can’t reach
- No batteries, never flat when it matters
Against
- Slower than a laser for a whole room
- Blade hook needs a surface to catch onto
Typically £20–£28
Check price on AmazonInto the loft, the cellar and behind the boiler
Energizer Vision Ultra HD head torch
Best for anywhere the light switch doesn’t reach
Most houses have somewhere a viewing walks straight past because it’s dark — a loft hatch left closed, a cellar with no working bulb, the gap behind a boiler or under the stairs. A head torch keeps both hands free to actually open the hatch and look, rather than one holding a phone torch at an angle that lights nothing useful. A decent flood beam and several hours’ runtime on AAAs, nothing to charge before leaving the house — brighter, rechargeable options are in the head torches guide.
For
- Hands free for opening hatches, doors and cupboards
- AAA-powered — never flat from sitting in a drawer
Against
- No focus adjustment
- Basic beam compared with a professional trade torch
Typically £15–£22
Check price on AmazonThe roofline you can’t get close to
Occer 12x25 compact binoculars
Best for chimneys, gutters and roof coverings from the garden
A second viewing rarely comes with a ladder, and most roof problems — slipped or missing tiles, a leaning chimney stack, moss and vegetation choking a gutter — are visible from the garden if there’s something to see them properly with. A folding compact pair is small enough not to feel strange carrying into a house, with enough magnification to check a roofline or a neighbour’s flank wall without asking to borrow a ladder. Full-size options with better low-light performance are in the binoculars guide.
For
- Small enough not to feel out of place at a viewing
- Genuinely useful magnification for a roofline
Against
- Narrower field of view than a full-size pair
- Less light-gathering in poor weather or dusk
Typically £25–£35
Check price on AmazonWhich way does the garden face
Suunto A-10 NH Compass
Best for orientation — does the garden get the sun the listing photos implied
Listing photos are shot for the best light of the day, not the light a garden gets most afternoons. A bearing off the back of the house takes under a minute and settles whether “south-facing garden” in the particulars is accurate, or whether a conservatory actually faces north and will be gloomy most of the year. A basic orienteering compass with a rotating bezel and printed scale — the same tool used for map reading, rather than a phone app that a steel front door or a fridge freezer can throw off by tens of degrees.
For
- A genuine bearing in seconds, no app or signal needed
- Useful well beyond this one viewing
Against
- Reads magnetic bearing, not true north
- Close enough for orientation, not for survey-grade work
Typically £18–£25
Check price on AmazonA five-minute electrical check
Draper 34279 13A Socket Tester
Best for a quick plug-in check of wiring and earth before an offer goes in
Plugged into a handful of sockets around the house, this gives an instant read on wiring faults or a missing earth — not a substitute for a full EICR, but a five-minute check that occasionally surfaces something worth asking about before an offer's made. Simple traffic-light LED codes read against a printed chart on the body, no meter reading to interpret. Fuller-function testers with RCD trip checks are in the socket testers guide.
For
- Immediate result, no training needed to read it
- Cheap enough to leave in the car permanently
Against
- Basic wiring check only, no loop impedance or RCD trip time
- A fault still needs a qualified electrician to confirm
Typically £10–£16
Check price on AmazonGetting it in writing
Rite in the Rain All-Weather Notebook No. 135
Best for notes an agent walking beside you won’t overhear you typing
A phone note app works, but stopping to type in front of an agent changes how a viewing goes; a small paper notebook in a coat pocket lets a list get jotted down — room dimensions, the damp reading, the compass bearing, a question for later — without breaking the conversation. The synthetic paper survives a damp cellar or a wet coat pocket, which ordinary paper doesn’t, and it’s the same pocket size that survives being carried and forgotten about for months.
For
- Discreet, no battery, fits a coat pocket
- Keeps every other reading here in one place
Against
- Small pocket size limits how much fits on a page
- Only useful if it’s actually carried in
Typically £6–£9
Check price on AmazonWhat actually matters — and what doesn’t
A number is only useful with context. A damp meter reading of “high” against a skirting board with no other clue means little on its own — note where, and mention it to a surveyor rather than treating it as a verdict.
Don’t let a good reading talk you out of a survey. A dry damp meter reading and a square compass bearing are reassuring, not conclusive — they check a handful of spots, not the roof structure, the foundations or what’s inside a wall.
Cheap and simple beats capable and slow. Everything here is chosen for the ten minutes of a viewing, not professional daily use — a pin-type meter over a lab-grade pinless one, a basic compass over a phone app fighting a steel door.
Ask before you test. Pressing a damp meter’s pins into paintwork, however small the mark, is worth a quick “do you mind if I check this wall” first. Most sellers and agents don’t mind — it’s a courtesy, not an assumption.
Questions I get asked
Do I need all eight of these for a first viewing? No — save this kit for a second viewing on a house being seriously considered, once first impressions have worn off enough to actually check things rather than fall for the light in the kitchen.
Will a damp reading at a viewing tell me if I need a survey? No — treat any reading, high or low, as one data point for a surveyor rather than a verdict either way. Even a dry reading in one spot says nothing about damp elsewhere in the building.
Can I just use my phone instead of half of this? A phone covers photos reasonably well, but its compass reads erratically near steel doors and appliances, and a laser measure or damp meter has no phone equivalent worth trusting.
What should actually make me walk away at a viewing? Nothing here should decide that alone — a high damp reading, a leaning chimney through binoculars or a failed socket test are reasons to ask harder questions and book a proper survey, not reasons to rule a house out on the spot.
This kit gets you to an informed offer, not a survey report — once there’s a house worth pursuing, a HomeBuyer Survey is the next step, covering the roof structure, damp causes and defects a viewing never will. See what a house survey typically costs for the different levels available. Get in touch, and there are more field-kit guides to work through.
Small print. This guide is general information, not a substitute for an actual survey of any specific property. Prices are indicative, move constantly and are checked at the time of writing; the linked page always shows the current price. As an Amazon Associate I earn from qualifying purchases.