SL4 postcode area house prices

SL4 has an average sold price of £405,038 across 24,570 HM Land Registry transactions covering 1,026 postcodes. The largest town grouping is Windsor.

Updated October 2026Records through August 2026HM Land Registry31+ million records

SL4 at a glance

SL4 postcode area averages £405,038 across 24,570 completed sales covering 1,026 postcodes. Check the median, sample depth and nearby postcodes before using the average as a market signal.

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Average £405,038 · Median £320,000 · 24,570 transactions · +33.2% growth · 1,026 postcodes

Data source: HM Land Registry; Updated October 2026
Sample quality: High transaction depth; 24,570 sales across 1,026 postcodes
Median check: £320,000; Mean and median differ — inspect local mix
Trend signal: +33.2%; The five-year price movement is +33.2%.
Coverage: 1,026 postcodes; Largest town: Windsor

SL4 Postcode Area Overview

The SL4 postcode area averages £405,038 across 24,570 registered sales — above the national average of £400,016 by +1.3%. The median price across constituent postcodes is £320,000, suggesting higher-value sales pull the mean upward. 1,026 postcodes cover this area, with data sourced from HM Land Registry Price Paid Records. The principal town is Windsor, which accounts for the largest share of transactions in this postcode area. The five-year price movement is +33.2%, in line with national growth.

Postcodes in SL4

SL4 3GZ£272,672 average156 sales SL4 3QR£387,547 average151 sales SL4 3LE£224,153 average146 sales SL4 5DX£270,362 average136 sales SL4 5EU£254,990 average136 sales SL4 5BU£345,202 average128 sales SL4 3TN£599,987 average126 sales SL4 3EN£237,644 average124 sales SL4 5DU£328,508 average124 sales SL4 5BP£326,197 average123 sales SL4 3RE£169,215 average122 sales SL4 3HS£511,983 average117 sales SL4 3LF£211,049 average116 sales SL4 3JP£329,099 average113 sales SL4 1JJ£399,142 average107 sales SL4 3DR£357,788 average106 sales SL4 3ER£402,072 average106 sales SL4 3JS£326,432 average104 sales SL4 1HL£390,473 average103 sales SL4 3SE£359,392 average101 sales SL4 3TP£139,850 average98 sales SL4 4UP£647,004 average96 sales SL4 6PL£222,445 average95 sales SL4 2QD£297,179 average92 sales SL4 1HX£364,624 average91 sales SL4 2SN£246,261 average90 sales SL4 4EF£166,374 average90 sales SL4 5BW£235,153 average90 sales SL4 5BX£357,178 average90 sales SL4 3EG£199,345 average88 sales SL4 1JN£339,232 average86 sales SL4 1RZ£257,553 average85 sales SL4 6LA£237,663 average85 sales SL4 5AY£286,722 average82 sales SL4 5BL£252,588 average81 sales SL4 2AQ£487,420 average80 sales SL4 2HN£573,896 average80 sales SL4 3BG£392,852 average79 sales SL4 3EP£222,062 average78 sales SL4 3NB£302,746 average78 sales SL4 2AD£493,391 average77 sales SL4 4PD£252,892 average77 sales SL4 2BE£828,459 average75 sales SL4 1SJ£264,513 average74 sales SL4 4YZ£346,805 average74 sales SL4 3DS£250,126 average73 sales SL4 4JS£178,566 average73 sales SL4 4PS£251,820 average73 sales SL4 4US£263,718 average73 sales SL4 3DT£284,017 average72 sales SL4 4TA£328,366 average72 sales SL4 4GY£225,814 average71 sales SL4 1JQ£631,721 average70 sales SL4 4HU£227,475 average70 sales SL4 3JU£348,826 average69 sales SL4 3AX£630,318 average68 sales SL4 3ED£220,838 average68 sales SL4 5GG£522,397 average68 sales SL4 5HF£288,831 average68 sales SL4 4NF£236,388 average67 sales SL4 3BQ£443,238 average66 sales SL4 3NW£327,361 average66 sales SL4 4PE£182,819 average66 sales SL4 4PU£176,723 average66 sales SL4 5BY£275,032 average66 sales SL4 6JE£174,294 average66 sales SL4 2AW£321,576 average65 sales SL4 2QL£291,638 average65 sales SL4 3JX£426,552 average65 sales SL4 3PP£381,638 average65 sales SL4 5GE£317,088 average65 sales SL4 6JL£259,006 average65 sales SL4 3HQ£172,743 average64 sales SL4 5BT£327,529 average64 sales SL4 2QA£357,242 average62 sales SL4 3SY£213,074 average61 sales SL4 4JH£285,644 average61 sales SL4 4YY£316,791 average61 sales SL4 6NG£340,798 average61 sales SL4 3AQ£606,748 average60 sales

Compare postcodes in SL4

Use the location comparison tool to put SL4 postcodes beside other postcode areas, towns or districts before narrowing your shortlist.

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Property valuation guide

Estimate a property value in the SL4 area

Professional valuers use recent sold prices as comparable evidence. In the SL4 area, the median sold price is £320,000 and the average is £405,038, based on 24,570 HM Land Registry transactions. Over five years, prices have moved +33.2%, which affects how comparables from earlier years should be weighted.

Typical comparable range: £272,000–£368,000(±15% from median)

These are historical completed-sale prices — not a formal valuation, asking price or investment advice. Use them to sense-check an asking price or set expectations before instructing a surveyor.

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Frequently asked questions

What is the average sold price in the SL4 postcode area?

The average sold price in SL4 is £405,038, based on 24,570 HM Land Registry transactions across 1,026 postcodes.

How does SL4 compare to the national average?

SL4 is +1.3% above the England and Wales national average of £400,016.

Are these figures valuations or asking prices?

No. These are historical completed sale prices from HM Land Registry Price Paid Data. They are not current valuations, asking prices or investment advice.

How many postcodes does the SL4 area cover?

The SL4 postcode area covers 1,026 individual postcodes with 24,570 registered sales. The largest town grouping is Windsor.

More about SL4

Windsor town Browse districts Market reports Methodology Compare locations Area guide: SL4

About this data

All sold price figures on this page come from HM Land Registry Price Paid Data for England and Wales, published under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right. These are historical completed sale prices — they are not current valuations, not forecasts and not investment advice. Past sale prices do not guarantee future values. Always seek independent professional advice before making property or financial decisions. Read the full methodology for details on data cleaning, grouping and limitations.