Historic house · Hounslow · London

Syon House

Syon House is a house with park in Isleworth, west London. Inside Hounslow’s built-up area is where it stands. The register lists it as a Grade I listed building.

Photo: Syon House, Russ Hamer (CC BY-SA 3.0)

Where

In Hounslow

inside the built-up area

How well known

Top 5%

#372 of 8,556 places we list

Warmest months

May–Sep

highs of 18–24°C

In brief

Historic house in Hounslow

One of the best-known places to visit in England, Scotland, Wales and Northern Ireland

#372 of the 8,556 museums, castles, gardens and other attractions we list, by how widely it is covered (15 Wikipedias). About ↓

Inside Hounslow

Syon House is inside Hounslow’s built-up area, with 43 more places to visit within 5 km. Towns near it ↓

Grade I listed building

On the official list of protected heritage; Hounslow has 465 listed buildings in all, on its History page. About ↓

Written from OpenStreetMap, Wikidata, the ONS built-up areas and Met Office 1991–2020 averages.

When to go

How the seasons run

For warmth, aim for May to September (18–24°C highs in Hounslow).

Jan8° / 3°61 mm

Feb9° / 3°45 mm

Mar12° / 4°39 mm

Apr15° / 6°43 mm

May18° / 9°44 mm

Jun21° / 12°50 mm

Jul24° / 14°44 mm

Aug23° / 14°55 mm

Sep20° / 11°52 mm

Oct16° / 9°67 mm

Nov11° / 5°70 mm

Dec9° / 3°61 mm

Green months are the warmest. Typical afternoon highs and night lows in Hounslow, and rain in a month. Met Office HadUK-Grid 1991–2020 averages for Hounslow. Opening times change through the year: check before you go. Hounslow’s full climate →

About

Syon House

Its Wikipedia coverage spans 15 languages. Top of the 451 other places within 15 km is Kew Gardens, 1.3 km off.

Hounslow’s listed buildings and monuments →

Type: Historic house
Listed: Grade I listed building
Wikipedias: Covered in 15 languages
Town: in Hounslow
Official site: syonpark.co.uk/explore/about-syon-house/#.VK-J0yuUfUU

Facts: Wikidata (CC0) and OpenStreetMap (© OpenStreetMap contributors).

The map

Around Syon House, mapped

Find Syon House in orange; each number is a place listed below.

Towns near it

Towns that count Syon House

Ealing tops the 6 for size, at 367,271 people. Its own town leads; the rest list it too, closest first.

1 · It’s in town

Hounslow

286,591 people · 106 places to visit

2 · 1.1 km south of it

Richmond upon Thames

192,888 people · 128 places to visit

3 · 1.7 km north of it

Ealing

367,271 people · 101 places to visit

4 · 4.2 km east of it

Wandsworth

326,725 people · 442 places to visit

Compare the 6 towns

Town	Where Syon House is	People	Places to visit
Hounslow	It’s in town	286,591	106
Richmond upon Thames	1.1 km south of it	192,888	128
Ealing	1.7 km north of it	367,271	101
Wandsworth	4.2 km east of it	326,725	442
Hammersmith and Fulham	4.9 km east of it	182,187	266
Kingston upon Thames	4.9 km south of it	166,333	67

Make a day of it

Nearby, too

Nearby, 451 places within 15 km include 3 museums, 2 historic houses and a garden.

GardenKew Gardens1.3 km away 2

Big drawMuseumBritish Museum14 km away · 5.8M visitors a year (2023)3

Historic houseBuckingham Palace12 km away 4

Cathedral · English HeritageWestminster Abbey13 km away 5

AttractionElizabeth Tower13 km away 6

Big drawMuseumVictoria and Albert Museum10 km away · 858K visitors a year (2021)7

Historic houseKensington Palace9.2 km away · 383K visitors a year (2015)8

Big drawMuseumNatural History Museum9.7 km away · 1.6M visitors a year (2021)

Within 15 km, close and well known first. Numbers match the map.

Visiting Syon House

Where is Syon House?

Syon House is in Hounslow, London, inside the town’s built-up area.

What is Syon House?

House with park in Isleworth, west London, England, UK.

When is the best time to visit Syon House?

May to September are the warmest months in Hounslow, with afternoon highs of 18–24°C (Met Office 1991–2020 averages).

Is Syon House a listed building?

Yes: Grade I listed building.

What else is there to see near Syon House?

Within 15 km: Kew Gardens (1.3 km), British Museum (14 km), Buckingham Palace (12 km) and Westminster Abbey (13 km).

Places: OpenStreetMap (© OpenStreetMap contributors, Open Database Licence) and Wikidata (CC0), placed in the ONS 2022 built-up area (Open Government Licence v3.0). Visitor counts are the latest Wikidata gives, with their year.

Photos: each place’s Wikidata image, from Wikimedia Commons under the licence below (our copy, resized).

Photo credits (9)

Syon House: Russ Hamer, CC BY-SA 3.0, Wikimedia Commons
Kew Gardens: Diliff, CC BY-SA 3.0, Wikimedia Commons
British Museum: Ham, CC BY-SA 3.0, Wikimedia Commons
Buckingham Palace: Diliff, CC BY-SA 3.0, Wikimedia Commons
Westminster Abbey: Σπάρτακος, CC BY-SA 3.0, Wikimedia Commons
Elizabeth Tower: Christian David, CC BY-SA 4.0, Wikimedia Commons
Victoria and Albert Museum: Diliff, CC BY-SA 3.0, Wikimedia Commons
Kensington Palace: Steve Cadman from London, U.K., CC BY-SA 2.0, Wikimedia Commons
Natural History Museum: Christine Matthews, CC BY-SA 2.0, Wikimedia Commons

Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2026. Contains OS data © Crown copyright and database right 2026 (ONS boundaries). Northern Ireland: Source: NISRA; contains Land & Property Services data and Ordnance Survey of Northern Ireland information, © Crown copyright, licensed under the Open Government Licence v3.0. Scotland: contains National Records of Scotland data, Registers of Scotland data and SEPA data, © Crown copyright / © SEPA 2025, licensed under the Open Government Licence v3.0.