SL1 postcode area house prices

SL1 has an average sold price of £240,732 across 36,827 HM Land Registry transactions covering 1,286 postcodes. The largest town grouping is Slough.

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

SL1 at a glance

SL1 postcode area averages £240,732 across 36,827 completed sales covering 1,286 postcodes. Check the median, sample depth and nearby postcodes before using the average as a market signal.

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Average £240,732 · Median £195,000 · 36,827 transactions · +682.5% growth · 1,286 postcodes

Data source: HM Land Registry; Updated October 2026
Sample quality: High transaction depth; 36,827 sales across 1,286 postcodes
Median check: £195,000; Mean and median differ — inspect local mix
Trend signal: +682.5%; The five-year price movement is +682.5%.
Coverage: 1,286 postcodes; Largest town: Slough

SL1 Postcode Area Overview

The SL1 postcode area averages £240,732 across 36,827 registered sales — below the national average of £400,016 by -39.8%. The median price across constituent postcodes is £195,000, suggesting higher-value sales pull the mean upward. 1,286 postcodes cover this area, with data sourced from HM Land Registry Price Paid Records. The principal town is Slough, which accounts for the largest share of transactions in this postcode area. The five-year price movement is +682.5%, in line with national growth.

Postcodes in SL1

SL1 2DA£131,590 average268 sales SL1 6PP£114,653 average189 sales SL1 6PG£110,130 average186 sales SL1 5UB£204,816 average169 sales SL1 2JP£117,331 average163 sales SL1 1ER£188,257 average151 sales SL1 1YL£244,323 average150 sales SL1 9JA£163,747 average149 sales SL1 2GB£114,309 average147 sales SL1 6PQ£121,894 average145 sales SL1 1RE£112,817 average143 sales SL1 5TT£172,435 average143 sales SL1 1EP£189,842 average138 sales SL1 2EZ£225,114 average137 sales SL1 3QG£155,384 average137 sales SL1 6JU£126,614 average135 sales SL1 3SS£197,367 average133 sales SL1 5UH£182,161 average129 sales SL1 6PB£204,326 average129 sales SL1 6PF£114,895 average125 sales SL1 9HN£141,190 average125 sales SL1 5EY£194,801 average122 sales SL1 7ET£146,360 average122 sales SL1 3QR£85,253 average121 sales SL1 6PD£121,333 average119 sales SL1 5DQ£161,852 average117 sales SL1 9JZ£140,827 average117 sales SL1 2QD£105,830 average116 sales SL1 3FX£286,791 average113 sales SL1 5DJ£245,960 average113 sales SL1 5SU£148,257 average111 sales SL1 2LZ£141,436 average106 sales SL1 9JX£148,627 average106 sales SL1 9DJ£145,662 average104 sales SL1 5NQ£219,898 average103 sales SL1 6EB£157,481 average103 sales SL1 9DN£117,807 average101 sales SL1 3RG£162,478 average100 sales SL1 5TQ£196,900 average99 sales SL1 6LB£114,301 average99 sales SL1 6PA£126,105 average99 sales SL1 8NJ£420,763 average99 sales SL1 9JY£147,871 average99 sales SL1 9DL£134,699 average98 sales SL1 8BN£264,647 average95 sales SL1 2DT£162,230 average94 sales SL1 5SP£123,029 average94 sales SL1 5NE£136,444 average93 sales SL1 2RQ£149,846 average92 sales SL1 6EE£152,779 average92 sales SL1 5TS£211,825 average91 sales SL1 6JS£212,432 average90 sales SL1 9DB£107,504 average90 sales SL1 2UT£121,965 average88 sales SL1 2YX£139,263 average88 sales SL1 6AL£191,242 average88 sales SL1 2JW£153,766 average87 sales SL1 2YT£175,441 average87 sales SL1 6EZ£266,991 average87 sales SL1 4YA£129,127 average86 sales SL1 5DT£194,976 average86 sales SL1 1NH£196,801 average85 sales SL1 1QP£456,183 average85 sales SL1 2NE£290,169 average85 sales SL1 2WN£209,491 average84 sales SL1 3QP£153,707 average83 sales SL1 7PB£269,143 average82 sales SL1 9JB£127,110 average82 sales SL1 1RF£125,382 average80 sales SL1 5BL£123,808 average80 sales SL1 5EU£196,593 average80 sales SL1 5NG£196,473 average80 sales SL1 7NU£139,205 average80 sales SL1 1GF£233,519 average79 sales SL1 1TW£72,085 average79 sales SL1 2LG£142,322 average79 sales SL1 2RG£128,478 average79 sales SL1 3GN£332,307 average79 sales SL1 3RX£108,372 average79 sales SL1 4XA£122,130 average79 sales

Compare postcodes in SL1

Use the location comparison tool to put SL1 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 SL1 area

Professional valuers use recent sold prices as comparable evidence. In the SL1 area, the median sold price is £195,000 and the average is £240,732, based on 36,827 HM Land Registry transactions. Over five years, prices have moved +682.5%, which affects how comparables from earlier years should be weighted.

Typical comparable range: £166,000–£224,000(±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 SL1 postcode area?

The average sold price in SL1 is £240,732, based on 36,827 HM Land Registry transactions across 1,286 postcodes.

How does SL1 compare to the national average?

SL1 is -39.8% below 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 SL1 area cover?

The SL1 postcode area covers 1,286 individual postcodes with 36,827 registered sales. The largest town grouping is Slough.

More about SL1

Slough town Browse districts Market reports Methodology Compare locations Area guide: SL1

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.